build: Readd systemd files to deb releases (ref #7564 ) (#7899 )

lib/connections: Remove future go build constraints on quic (#7898 )
build: Update x/sys to fix new issue in go 1.17
2026-01-01 02:19:06 -05:00 · 2021-08-22 20:04:47 +02:00 · 2021-08-19 21:05:28 +02:00 · 2021-08-19 20:38:14 +02:00 · 2021-08-18 07:45:38 +02:00 · 2021-08-17 10:10:41 +02:00
682 changed files with 104598 additions and 17213 deletions
--- a/.codecov.yml
+++ b/.codecov.yml
@@ -1,5 +1,20 @@
+comment: false
+
 coverage:
  range: "40...100"
+  precision: 1
+  status:
+    patch:
+      default:
+        informational: true
+    project:
+      default:
+        informational: true
+
+github_checks:
+  annotations: false

 ignore:
  - "**.pb.go"
+  - "**_mocked.go"
+  - "**/mocks/*"
--- a/.deepsource.toml
+++ b/.deepsource.toml
@@ -0,0 +1,12 @@
+version = 1
+
+exclude_patterns = ["*.pb.go"]
+test_patterns = ["*_test.go"]
+
+[[analyzers]]
+name = "go"
+enabled = true
+
+  [analyzers.meta]
+  import_paths = ["github.com/syncthing/syncthing"]
+  build_tags = ["noassets"]
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -0,0 +1,11 @@
+github: syncthing
+custom: "https://syncthing.net/donations/"
+
+# patreon: # Replace with a single Patreon username
+# open_collective: # Replace with a single Open Collective username
+# ko_fi: # Replace with a single Ko-fi username
+# tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+# community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+# liberapay: # Replace with a single Liberapay username
+# issuehunt: # Replace with a single IssueHunt username
+# otechie: # Replace with a single Otechie username
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -1,42 +0,0 @@
-### DO NOT REPORT SECURITY ISSUES IN THIS ISSUE TRACKER
-
-Instead, contact security@syncthing.net directly - see
-https://syncthing.net/security.html for more information.
-
-### DO NOT POST SUPPORT REQUESTS OR GENERAL QUESTIONS IN THIS ISSUE TRACKER
-
-Please use the forum at https://forum.syncthing.net/ where a large number of
-helpful people hang out. This issue tracker is for reporting bugs or feature
-requests directly to the developers. Worst case you might get a short
-"that's a bug, please report it on GitHub" response on the forum, in which
-case we thank you for your patience and following our advice. :)
-
-### Please use the correct issue tracker
-
-If your problem relates to a Syncthing wrapper or [sub-project](https://github.com/syncthing) such as [Syncthing for Android](https://github.com/syncthing/syncthing-android/issues), [SyncTrayzor](https://github.com/canton7/synctrayzor) or the [documentation](https://github.com/syncthing/docs/issues), please use their respective issue trackers.
-
-### Does your log mention database corruption?
-
-If your Syncthing log reports panics because of database corruption it is most likely a fault with your system's storage or memory. Affected log entries will contain lines starting with `panic: leveldb`. You will need to delete the index database to clear this, by running `syncthing -reset-database`.
-
-### Please do post actual bug reports and feature requests.
-
-If your issue is a bug report, replace this boilerplate with a description
-of the problem, being sure to include at least:
-
- - what happened,
- - what you expected to happen instead, and
- - any steps to reproduce the problem.
-
-Also fill out the version information below and add log output or
-screenshots as appropriate.
-
-If your issue is a feature request, simply replace this template text in
-its entirety.
-
-### Version Information
-
-Syncthing Version: v1.x.y
-OS Version: Windows 7 / Ubuntu 14.04 / ...
-Browser Version: (if applicable, for GUI issues)
-
--- a/.github/ISSUE_TEMPLATE/01-feature.md
+++ b/.github/ISSUE_TEMPLATE/01-feature.md
@@ -0,0 +1,13 @@
+---
+name: Feature request
+about: If you're just not sure how to do something, see "ask a question".
+labels: enhancement, needs-triage
+---
+
+### Include required information
+
+Please be sure to include at least:
+
+ - what problem your new feature would solve
+ - how or why you think it is generally useful (i.e., not just for you)
+ - what alternatives or workarounds you considered
--- a/.github/ISSUE_TEMPLATE/02-bug.md
+++ b/.github/ISSUE_TEMPLATE/02-bug.md
@@ -0,0 +1,23 @@
+---
+name: Bug report
+about: If you're actually looking for support, see "ask a question".
+labels: bug, needs-triage
+---
+
+### Does your log mention database corruption?
+
+If your Syncthing log reports panics because of database corruption it is
+most likely a fault with your system's storage or memory. Affected log
+entries will contain lines starting with `panic: leveldb`. You will need to
+delete the index database to clear this, by running `syncthing
+-reset-database`.
+
+### Include required information
+
+Please be sure to include at least:
+
+ - which version of Syncthing and what operating system you are using
+ - browser and version, if applicable
+ - what happened,
+ - what you expected to happen instead, and
+ - any steps to reproduce the problem.
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: I need help / I have a question
+    url: https://forum.syncthing.net/
+    about: Ask questions, get support, and discuss with other community members.
+  - name: Android issues
+    url: https://github.com/syncthing/syncthing-android/issues/
+    about: The Android app has its own issue tracker.
--- a/.github/SECURITY.md
+++ b/.github/SECURITY.md
@@ -1,48 +1,10 @@
 ## Reporting a Vulnerability

-If you believe that you've found a Syncthing-related security vulnerability, please report it by sending email to the address security@syncthing.net. The PGP key for security@syncthing.net (B683AD7B76CAB013) below can be used to send encrypted mail or to verify responses received from that address.
+If you believe that you've found a Syncthing-related security vulnerability,
+please report it by sending email to the address security@syncthing.net. The
+[PGP key for security@syncthing.net
+(B683AD7B76CAB013)](https://syncthing.net/security-key.txt) can be used to
+send encrypted mail or to verify responses received from that address.

-```
-----BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1
-
-mQENBFShFlIBCACsW346HYskhKhxrdZMjyU5Ntsjvg6/ogqINDPoL10/oaIP0G+t
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-M7Q8GZuww1rk
-=No/v
-----END PGP PUBLIC KEY BLOCK-----
-```
+You can read more about Syncthing security at
+https://syncthing.net/security/.
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: gomod
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
--- a/.gitignore
+++ b/.gitignore
@@ -15,12 +15,8 @@ coverage.xml
 syncthing.sig
 RELEASE
 deb
-lib/auto/gui.files.go
-snapcraft.yaml
-prime/
-snap/
-parts/
-stage/
-*.snap
 *.bz2
 /repos
+/proto/scripts/protoc-gen-gosyncthing
+/gui/next-gen-gui
+.idea
--- a/49
+++ b/49
@@ -17,7 +17,9 @@ Aaron Bieber (qbit) <qbit@deftly.net>
 Adam Piggott (ProactiveServices) <aD@simplypeachy.co.uk> <simplypeachy@users.noreply.github.com> <ProactiveServices@users.noreply.github.com> <adam@proactiveservices.co.uk>
 Adel Qalieh (adelq) <aqalieh95@gmail.com> <adelq@users.noreply.github.com>
 Alan Pope <alan@popey.com>
+Alberto Donato <albertodonato@users.noreply.github.com>
 Alessandro G. (alessandro.g89) <alessandro.g89@gmail.com>
+Alex Lindeman <139387+aelindeman@users.noreply.github.com>
 Alex Xu <alex.hello71@gmail.com>
 Alexander Graf (alex2108) <register-github@alex-graf.de>
 Alexandre Viau (aviau) <alexandre@alexandreviau.net> <aviau@debian.org>
@@ -32,6 +34,7 @@ andyleap <andyleap@gmail.com>
 Anjan Momi <anjan@momi.ca>
 Antoine Lamielle (0x010C) <antoine.lamielle@0x010c.fr> <gh@0x010c.fr>
 Antony Male (canton7) <antony.male@gmail.com>
+Anur <anurnomeru@163.com>
 Aranjedeath <Aranjedeath@users.noreply.github.com>
 Arkadiusz Tymiński <gevleeog@gmail.com>
 Arthur Axel fREW Schmidt (frioux) <frew@afoolishmanifesto.com> <frioux@gmail.com>
@@ -49,18 +52,23 @@ Benedikt Morbach <benedikt.morbach@googlemail.com>
 Benno Fünfstück <benno.fuenfstueck@gmail.com>
 Benny Ng (tpng) <benny.tpng@gmail.com>
 boomsquared <54829195+boomsquared@users.noreply.github.com>
+Boqin Qin <bobbqqin@bupt.edu.cn>
 Boris Rybalkin <ribalkin@gmail.com>
 Brandon Philips (philips) <brandon@ifup.org>
 Brendan Long (brendanlong) <self@brendanlong.com>
 Brian R. Becker (brbecker) <brbecker@gmail.com>
+bt90 <btom1990@googlemail.com>
 Caleb Callaway (cqcallaw) <enlightened.despot@gmail.com>
 Carsten Hagemann (carstenhag) <moter8@gmail.com> <carsten@chagemann.de>
 Cathryne Linenweaver (Cathryne) <cathryne.linenweaver@gmail.com> <Cathryne@users.noreply.github.com> <katrinleinweber@MAC.local>
 Cedric Staniewski (xduugu) <cedric@gmx.ca>
 chenrui <rui@meetup.com>
+Chih-Hsuan Yen <yan12125@gmail.com>
+Choongkyu <choongkyu.kim+gh@gmail.com> <vapidlyrapid+gh@gmail.com>
 Chris Howie (cdhowie) <me@chrishowie.com>
 Chris Joel (cdata) <chris@scriptolo.gy>
 Chris Tonkinson <chris@masterbran.ch>
+Christian Prescott <me@christianprescott.com>
 chucic <chucic@seznam.cz>
 Colin Kennedy (moshen) <moshen.colin@gmail.com>
 Cromefire_ <tim.l@nghorst.net> <26320625+cromefire@users.noreply.github.com>
@@ -72,10 +80,11 @@ Daniel Harte (norgeous) <daniel@harte.me> <daniel@danielharte.co.uk> <norgeous@u
 Daniel Martí (mvdan) <mvdan@mvdan.cc>
 Darshil Chanpura (dtchanpura) <dtchanpura@gmail.com> <dcprime314@gmail.com>
 David Rimmer (dinosore) <dinosore@dbrsoftware.co.uk>
+deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
 Denis A. (dva) <denisva@gmail.com>
 Dennis Wilson (snnd) <dw@risu.io>
 dependabot-preview[bot] <dependabot-preview[bot]@users.noreply.github.com> <27856297+dependabot-preview[bot]@users.noreply.github.com>
-dependabot[bot] <dependabot[bot]@users.noreply.github.com>
+dependabot[bot] <dependabot[bot]@users.noreply.github.com> <49699333+dependabot[bot]@users.noreply.github.com>
 derekriemer <derek.riemer@colorado.edu>
 desbma <desbma@users.noreply.github.com>
 Dmitry Saveliev (dsaveliev) <d.e.saveliev@gmail.com>
@@ -84,56 +93,72 @@ Dominik Heidler (asdil12) <dominik@heidler.eu>
 Elias Jarlebring (jarlebring) <jarlebring@gmail.com>
 Elliot Huffman <thelich2@gmail.com>
 Emil Hessman (ceh) <emil@hessman.se>
+Eric Lesiuta <elesiuta@gmail.com>
 Erik Meitner (WSGCSysadmin) <e.meitner@willystreet.coop>
 Evgeny Kuznetsov <evgeny@kuznetsov.md>
 Federico Castagnini (facastagnini) <federico.castagnini@gmail.com>
 Felix Ableitner (Nutomic) <me@nutomic.com>
+Felix Lampe <mail@flampe.de>
 Felix Unterpaintner (bigbear2nd) <bigbear2nd@gmail.com>
 Francois-Xavier Gsell (zukoo) <fxgsell@gmail.com>
 Frank Isemann (fti7) <frank@isemann.name>
+Gahl Saraf <saraf.gahl@gmail.com>
 georgespatton <georgespatton@users.noreply.github.com>
 ghjklw <malo@jaffre.info>
 Gilli Sigurdsson (gillisig) <gilli@vx.is>
+Gleb Sinyavskiy <zhulik.gleb@gmail.com>
 Graham Miln (grahammiln) <graham.miln@dssw.co.uk> <graham.miln@miln.eu>
+greatroar <61184462+greatroar@users.noreply.github.com>
 Han Boetes <han@boetes.org>
+HansK-p <42314815+HansK-p@users.noreply.github.com>
 Harrison Jones (harrisonhjones) <harrisonhjones@users.noreply.github.com>
 Heiko Zuerker (Smiley73) <heiko@zuerker.org>
 Hugo Locurcio <hugo.locurcio@hugo.pro>
 Iain Barnett <iainspeed@gmail.com>
 Ian Johnson (anonymouse64) <ian.johnson@canonical.com> <person.uwsome@gmail.com>
+Ikko Ashimine <eltociear@gmail.com>
 Ilya Brin <464157+ilyabrin@users.noreply.github.com>
 Iskander Sharipov (Alex) <quasilyte@gmail.com>
 Jaakko Hannikainen (jgke) <jgke@jgke.fi>
 Jacek Szafarkiewicz (hadogenes) <szafar@linux.pl>
+Jack Croft <jccroft1@users.noreply.github.com>
 Jacob <jyundt@gmail.com>
 Jake Peterson (acogdev) <jake@acogdev.com>
 Jakob Borg (calmh) <jakob@nym.se> <jakob@kastelo.net>
 James Patterson (jpjp) <jamespatterson@operamail.com> <jpjp@users.noreply.github.com>
 janost <janost@tuta.io>
+Jaroslav Lichtblau <svetlemodry@users.noreply.github.com>
 Jaroslav Malec (dzarda) <dzardacz@gmail.com>
 jaseg <githubaccount@jaseg.net>
 Jaya Chithra (jayachithra) <s.k.jayachithra@gmail.com>
 jelle van der Waa <jelle@vdwaa.nl>
 Jens Diemer (jedie) <github.com@jensdiemer.de> <git@jensdiemer.de>
 Jerry Jacobs (xor-gate) <jerry.jacobs@xor-gate.org> <xor-gate@users.noreply.github.com>
+Jesse Lucas <jesse@jesselucas.com>
 Jochen Voss (seehuhn) <voss@seehuhn.de>
 Johan Andersson <j@i19.se>
 Johan Vromans (sciurius) <jvromans@squirrel.nl>
 John Rinehart (fuzzybear3965) <johnrichardrinehart@gmail.com>
 Jonas Thelemann <e-mail@jonas-thelemann.de>
+Jonathan <artback@protonmail.com> <jonagn@gmail.com>
 Jonathan Cross <jcross@gmail.com>
+Jonta <359397+Jonta@users.noreply.github.com>
 Jose Manuel Delicado (jmdaweb) <jmdaweb@hotmail.com> <jmdaweb@users.noreply.github.com>
+jtagcat <git-514635f7@jtag.cat>
 Jörg Thalheim <Mic92@users.noreply.github.com>
+Jędrzej Kula <kula.jedrek@gmail.com>
 Kalle Laine <pahakalle@protonmail.com>
 Karol Różycki (krozycki) <rozycki.karol@gmail.com>
 Keith Turner <kturner@apache.org>
 Kelong Cong (kc1212) <kc04bc@gmx.com> <kc1212@users.noreply.github.com>
 Ken'ichi Kamada (kamadak) <kamada@nanohz.org>
 Kevin Allen (ironmig) <kma1660@gmail.com>
+Kevin Bushiri (keevBush) <keevbush@gmail.com> <36192217+keevBush@users.noreply.github.com>
 Kevin White, Jr. (kwhite17) <kevinwhite1710@gmail.com>
 klemens <ka7@github.com>
 Kurt Fitzner (Kudalufi) <kurt@va1der.ca> <kurt.fitzner@gmail.com>
 Lars K.W. Gohlke (lkwg82) <lkwg82@gmx.de>
+Lars Lehtonen <lars.lehtonen@gmail.com>
 Laurent Arnoud <laurent@spkdev.net>
 Laurent Etiemble (letiemble) <laurent.etiemble@gmail.com> <laurent.etiemble@monobjc.net>
 Leo Arias (elopio) <yo@elopio.net>
@@ -147,6 +172,7 @@ Marc Pujol (kilburn) <kilburn@la3.org>
 Marcin Dziadus (marcindziadus) <dziadus.marcin@gmail.com>
 marco-m <marco.molteni@laposte.net>
 Marcus Legendre <marcus.legendre@gmail.com>
+Mario Majila <mariustshipichik@gmail.com>
 Mark Pulford (mpx) <mark@kyne.com.au>
 Mateusz Naściszewski (mateon1) <matin1111@wp.pl>
 Mateusz Ż <thedead4fun@live.com>
@@ -158,23 +184,31 @@ Maurizio Tomasi <ziotom78@gmail.com>
 Max Schulze (kralo) <max.schulze@online.de> <kralo@users.noreply.github.com>
 MaximAL <almaximal@ya.ru>
 Maxime Thirouin <m@moox.io>
+mclang <1721600+mclang@users.noreply.github.com>
 Michael Jephcote (Rewt0r) <rewt0r@gmx.com> <Rewt0r@users.noreply.github.com>
 Michael Ploujnikov (plouj) <ploujj@gmail.com>
+Michael Rienstra <mrienstra@gmail.com>
 Michael Tilli (pyfisch) <pyfisch@gmail.com>
+MichaIng <micha@dietpi.com>
 Mike Boone <mike@boonedocks.net>
 MikeLund <MikeLund@users.noreply.github.com>
+MikolajTwarog <43782609+MikolajTwarog@users.noreply.github.com>
 Mingxuan Lin <gdlmx@users.noreply.github.com>
+mv1005 <49659413+mv1005@users.noreply.github.com>
 Nate Morrison (nrm21) <natemorrison@gmail.com>
 Nicholas Rishel (PrototypeNM1) <rishel.nick@gmail.com> <PrototypeNM1@users.noreply.github.com>
 Nico Stapelbroek <3368018+nstapelbroek@users.noreply.github.com>
 Nicolas Braud-Santoni <nicolas@braud-santoni.eu>
+Nicolas Perraut <n.perraut@gmail.com>
 Niels Peter Roest (Niller303) <nielsproest@hotmail.com> <seje.niels@hotmail.com>
 Nils Jakobi (thunderstorm99) <jakobi.nils@gmail.com>
+NinoM4ster <ninom4ster@gmail.com>
 Nitroretro <43112364+Nitroretro@users.noreply.github.com>
 NoLooseEnds <jon.koslung@gmail.com>
 Oliver Freyermuth <o.freyermuth@googlemail.com>
 otbutz <tbutz@optitool.de>
 Otiel <Otiel@users.noreply.github.com>
+overkill <22098433+0verk1ll@users.noreply.github.com>
 Oyebanji Jacob Mayowa <oyebanji05@gmail.com>
 Pablo <pbaeyens31+github@gmail.com>
 Pascal Jungblut (pascalj) <github@pascalj.com> <mail@pascal-jungblut.com>
@@ -186,14 +220,18 @@ Peter Badida <KeyWeeUsr@users.noreply.github.com>
 Peter Dave Hello <hsu@peterdavehello.org>
 Peter Hoeg (peterhoeg) <peter@speartail.com>
 Peter Marquardt (wwwutz) <wwwutz@gmail.com> <wwwutz@googlemail.com>
+Phani Rithvij <phanirithvij2000@gmail.com>
 Phil Davis <phil.davis@inf.org>
 Philippe Schommers (filoozoom) <philippe@schommers.be>
 Phill Luby (pluby) <phill.luby@newredo.com>
 Pier Paolo Ramon <ramonpierre@gmail.com>
 Piotr Bejda (piobpl) <piotrb10@gmail.com>
 Pramodh KP (pramodhkp) <pramodh.p@directi.com> <1507241+pramodhkp@users.noreply.github.com>
+Quentin Hibon <qh.public@yahoo.com>
+Rahmi Pruitt <rjpruitt16@gmail.com>
 Richard Hartmann <RichiH@users.noreply.github.com>
 Robert Carosi (nov1n) <robert@carosi.nl>
+Roberto Santalla <roobre@users.noreply.github.com>
 Robin Schoonover <robin@cornhooves.org>
 Roman Zaynetdinov (zaynetro) <romanznet@gmail.com>
 Ross Smith II (rasa) <ross@smithii.com>
@@ -203,20 +241,23 @@ Ryan Sullivan (KayoticSully) <kayoticsully@gmail.com>
 Sacheendra Talluri (sacheendra) <sacheendra.t@gmail.com>
 Scott Klupfel (kluppy) <kluppy@going2blue.com>
 Sergey Mishin (ralder) <ralder@yandex.ru>
+Shaarad Dalvi <60266155+shaaraddalvi@users.noreply.github.com>
 Simon Frei (imsodin) <freisim93@gmail.com>
 Simon Mwepu <simonmwepu@gmail.com>
 Sly_tom_cat <slytomcat@mail.ru>
 Stefan Kuntz (Stefan-Code) <stefan.github@gmail.com> <Stefan.github@gmail.com>
 Stefan Tatschner (rumpelsepp) <stefan@sevenbyte.org> <rumpelsepp@sevenbyte.org> <stefan@rumpelsepp.org>
+Steven Eckhoff <steven.eckhoff.opensource@gmail.com>
 Suhas Gundimeda (snugghash) <suhas.gundimeda@gmail.com> <snugghash@gmail.com>
 Taylor Khan (nelsonkhan) <nelsonkhan@gmail.com>
 Thomas Hipp <thomashipp@gmail.com>
 Tim Abell (timabell) <tim@timwise.co.uk>
 Tim Howes (timhowes) <timhowes@berkeley.edu>
+Tobias Klauser <tobias.klauser@gmail.com>
 Tobias Nygren (tnn2) <tnn@nygren.pp.se>
 Tobias Tom (tobiastom) <t.tom@succont.de>
 Tom Jakubowski <tom@crystae.net>
-Tomasz Wilczyński <5626656+tomasz1986@users.noreply.github.com>
+Tomasz Wilczyński <5626656+tomasz1986@users.noreply.github.com> <twilczynski@naver.com>
 Tommy Thorn <tommy-github-email@thorn.ws>
 Tully Robinson (tojrobinson) <tully@tojr.org>
 Tyler Brazier (tylerbrazier) <tyler@tylerbrazier.com>
@@ -225,10 +266,12 @@ Unrud (Unrud) <unrud@openaliasbox.org> <Unrud@users.noreply.github.com>
 Veeti Paananen (veeti) <veeti.paananen@rojekti.fi>
 Victor Buinsky (buinsky) <vix_booja@tut.by>
 Vil Brekin (Vilbrekin) <vilbrekin@gmail.com>
-Vladimir Rusinov <vrusinov@google.com>
+Vladimir Rusinov <vrusinov@google.com> <vladimir.rusinov@gmail.com>
 wangguoliang <liangcszzu@163.com>
 William A. Kennington III (wkennington) <william@wkennington.com>
+wouter bolsterlee <wouter@bolsterl.ee>
 Wulf Weich (wweich) <wweich@users.noreply.github.com> <wweich@gmx.de> <wulf@weich-kr.de>
+xarx00 <xarx00@users.noreply.github.com>
 Xavier O. (damajor) <damajor@gmail.com>
 xjtdy888 (xjtdy888) <xjtdy888@163.com>
 Yannic A. (eipiminus1) <eipiminusone+github@gmail.com> <eipiminus1@users.noreply.github.com>
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 ## Reporting Bugs

-Please file bugs in the [Github Issue
+Please file bugs in the [GitHub Issue
 Tracker](https://github.com/syncthing/syncthing/issues). Include at
 least the following:

--- a/9
+++ b/9
@@ -1,4 +1,5 @@
-FROM golang:1.13 AS builder
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder

 WORKDIR /src
 COPY . .
@@ -10,11 +11,11 @@ RUN rm -f syncthing && go run build.go -no-upgrade build syncthing

 FROM alpine

-EXPOSE 8384 22000 21027/udp
+EXPOSE 8384 22000/tcp 22000/udp 21027/udp

 VOLUME ["/var/syncthing"]

-RUN apk add --no-cache ca-certificates su-exec
+RUN apk add --no-cache ca-certificates su-exec tzdata

 COPY --from=builder /src/syncthing /bin/syncthing
 COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh
@@ -22,7 +23,7 @@ COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh
 ENV PUID=1000 PGID=1000 HOME=/var/syncthing

 HEALTHCHECK --interval=1m --timeout=10s \
-  CMD nc -z localhost 8384 || exit 1
+  CMD nc -z 127.0.0.1 8384 || exit 1

 ENV STGUIADDRESS=0.0.0.0:8384
 ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing", "-home", "/var/syncthing/config"]
--- a/Dockerfile.builder
+++ b/Dockerfile.builder
@@ -1,17 +1,9 @@
-# We will grab the Go compiler from the latest Go image.
-FROM golang:1.13 as go
-
-# Otherwise we base on the snapcraft container as that is by far the
-# most complex and tricky thing to get installed and working...
-FROM snapcore/snapcraft
-
-# Go
-COPY --from=go /usr/local/go /usr/local/go
-ENV PATH="/usr/local/go/bin:$PATH"
+ARG GOVERSION=latest
+FROM golang:$GOVERSION

 # FPM to build Debian packages
 RUN apt-get update && apt-get install -y --no-install-recommends \
 	locales rubygems ruby-dev build-essential git \
 	&& apt-get clean \
 	&& rm -rf /var/lib/apt/lists/* \
-	&& gem install --no-ri --no-rdoc fpm
+	&& gem install fpm
--- a/Dockerfile.buildx
+++ b/Dockerfile.buildx
@@ -0,0 +1,19 @@
+FROM alpine
+ARG TARGETARCH
+
+EXPOSE 8384 22000/tcp 22000/udp 21027/udp
+
+VOLUME ["/var/syncthing"]
+
+RUN apk add --no-cache ca-certificates su-exec tzdata
+
+COPY ./syncthing-linux-$TARGETARCH /bin/syncthing
+COPY ./script/docker-entrypoint.sh /bin/entrypoint.sh
+
+ENV PUID=1000 PGID=1000 HOME=/var/syncthing
+
+HEALTHCHECK --interval=1m --timeout=10s \
+  CMD nc -z 127.0.0.1 8384 || exit 1
+
+ENV STGUIADDRESS=0.0.0.0:8384
+ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing", "-home", "/var/syncthing/config"]
--- a/Dockerfile.stdiscosrv
+++ b/Dockerfile.stdiscosrv
@@ -1,4 +1,5 @@
-FROM golang:1.13 AS builder
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder

 WORKDIR /src
 COPY . .
--- a/Dockerfile.strelaysrv
+++ b/Dockerfile.strelaysrv
@@ -1,4 +1,5 @@
-FROM golang:1.13 AS builder
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder

 WORKDIR /src
 COPY . .
--- a/README-Docker.md
+++ b/README-Docker.md
@@ -7,17 +7,42 @@ Use the `/var/syncthing` volume to have the synchronized files available on the
 host. You can add more folders and map them as you prefer.

 Note that Syncthing runs as UID 1000 and GID 1000 by default. These may be
-altered with the ``PUID`` and ``PGID`` environment variables.
+altered with the ``PUID`` and ``PGID`` environment variables. In addition
+the name of the Syncthing instance can be optionally defined by using
+``--hostname=syncthing`` parameter.

 ## Example Usage

+**Docker cli**
 ```
 $ docker pull syncthing/syncthing
-$ docker run -p 8384:8384 -p 22000:22000 \
+$ docker run -p 8384:8384 -p 22000:22000/tcp -p 22000:22000/udp \
    -v /wherever/st-sync:/var/syncthing \
+    --hostname=my-syncthing \
    syncthing/syncthing:latest
 ```

+**Docker compose**
+```
+---
+version: "3"
+services:
+  syncthing:
+    image: syncthing/syncthing
+    container_name: syncthing
+    hostname: my-syncthing
+    environment:
+      - PUID=1000
+      - PGID=1000
+    volumes:
+      - /wherever/st-sync:/var/syncthing
+    ports:
+      - 8384:8384
+      - 22000:22000/tcp
+      - 22000:22000/udp
+    restart: unless-stopped
+```
+
 ## Discovery

 Note that local device discovery will not work with the above command,
--- a/README.md
+++ b/README.md
@@ -73,14 +73,13 @@ This helps the team understand what are the biggest pain points for our users, a

 ## Getting in Touch

-The first and best point of contact is the [Forum][8]. There is also an IRC
-channel, `#syncthing` on [freenode][4] (with a [web client][9]), for talking
-directly to developers and users. If you've found something that is clearly a
+The first and best point of contact is the [Forum][8].
+If you've found something that is clearly a
 bug, feel free to report it in the [GitHub issue tracker][10].

 ## Building

-Building Syncthing from source is easy, and there's a [guide][5]
+Building Syncthing from source is easy, and there's [a guide][5]
 that describes it for both Unix and Windows systems.

 ## Signed Releases
@@ -101,18 +100,16 @@ All code is licensed under the [MPLv2 License][7].

 [1]: https://docs.syncthing.net/specs/bep-v1.html
 [2]: https://docs.syncthing.net/intro/getting-started.html
-[3]: https://github.com/syncthing/syncthing/blob/master/etc
-[4]: https://www.freenode.net/
+[3]: https://github.com/syncthing/syncthing/blob/main/etc
 [5]: https://docs.syncthing.net/dev/building.html
 [6]: https://docs.syncthing.net/
-[7]: https://github.com/syncthing/syncthing/blob/master/LICENSE
+[7]: https://github.com/syncthing/syncthing/blob/main/LICENSE
 [8]: https://forum.syncthing.net/
-[9]: https://kiwiirc.com/client/irc.freenode.net/#syncthing
 [10]: https://github.com/syncthing/syncthing/issues
 [11]: https://docs.syncthing.net/users/contrib.html#gui-wrappers
 [12]: https://www.bountysource.com/teams/syncthing/issues
-[13]: https://github.com/syncthing/syncthing/blob/master/GOALS.md
+[13]: https://github.com/syncthing/syncthing/blob/main/GOALS.md
 [14]: assets/logo-text-128.png
 [15]: https://syncthing.net/
-[16]: https://github.com/syncthing/syncthing/blob/master/README-Docker.md
+[16]: https://github.com/syncthing/syncthing/blob/main/README-Docker.md

--- a/build.go
+++ b/build.go
@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

+//go:build ignore
 // +build ignore

 package main
@@ -14,7 +15,6 @@ import (
 	"bytes"
 	"compress/flate"
 	"compress/gzip"
-	"crypto/sha256"
 	"encoding/json"
 	"errors"
 	"flag"
@@ -25,7 +25,6 @@ import (
 	"os"
 	"os/exec"
 	"os/user"
-	"path"
 	"path/filepath"
 	"regexp"
 	"runtime"
@@ -36,21 +35,26 @@ import (
 )

 var (
-	versionRe     = regexp.MustCompile(`-[0-9]{1,3}-g[0-9a-f]{5,10}`)
-	goarch        string
-	goos          string
-	noupgrade     bool
-	version       string
-	goCmd         string
-	race          bool
-	debug         = os.Getenv("BUILDDEBUG") != ""
-	extraTags     string
-	installSuffix string
-	pkgdir        string
-	cc            string
-	debugBinary   bool
-	coverage      bool
-	timeout       = "120s"
+	goarch         string
+	goos           string
+	noupgrade      bool
+	version        string
+	goCmd          string
+	race           bool
+	debug          = os.Getenv("BUILDDEBUG") != ""
+	extraTags      string
+	installSuffix  string
+	pkgdir         string
+	cc             string
+	run            string
+	benchRun       string
+	debugBinary    bool
+	coverage       bool
+	long           bool
+	timeout        = "120s"
+	longTimeout    = "600s"
+	numVersions    = 5
+	withNextGenGUI = os.Getenv("BUILD_NEXT_GEN_GUI") != ""
 )

 type target struct {
@@ -58,12 +62,11 @@ type target struct {
 	debname           string
 	debdeps           []string
 	debpre            string
-	debpost           string
 	description       string
 	buildPkgs         []string
 	binaryName        string
 	archiveFiles      []archiveFile
-	systemdServices   []string
+	systemdService    string
 	installationFiles []archiveFile
 	tags              []string
 }
@@ -85,7 +88,6 @@ var targets = map[string]target{
 		name:        "syncthing",
 		debname:     "syncthing",
 		debdeps:     []string{"libc6", "procps"},
-		debpost:     "script/post-upgrade",
 		description: "Open Source Continuous File Synchronization",
 		buildPkgs:   []string{"github.com/syncthing/syncthing/cmd/syncthing"},
 		binaryName:  "syncthing", // .exe will be added automatically for Windows builds
@@ -96,6 +98,7 @@ var targets = map[string]target{
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 			// All files from etc/ and extra/ added automatically in init().
 		},
+		systemdService: "syncthing@*.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "README.md", dst: "deb/usr/share/doc/syncthing/README.txt", perm: 0644},
@@ -114,6 +117,7 @@ var targets = map[string]target{
 			{src: "etc/linux-systemd/system/syncthing@.service", dst: "deb/lib/systemd/system/syncthing@.service", perm: 0644},
 			{src: "etc/linux-systemd/system/syncthing-resume.service", dst: "deb/lib/systemd/system/syncthing-resume.service", perm: 0644},
 			{src: "etc/linux-systemd/user/syncthing.service", dst: "deb/usr/lib/systemd/user/syncthing.service", perm: 0644},
+			{src: "etc/linux-sysctl/30-syncthing.conf", dst: "deb/usr/lib/sysctl.d/30-syncthing.conf", perm: 0644},
 			{src: "etc/firewall-ufw/syncthing", dst: "deb/etc/ufw/applications.d/syncthing", perm: 0644},
 			{src: "etc/linux-desktop/syncthing-start.desktop", dst: "deb/usr/share/applications/syncthing-start.desktop", perm: 0644},
 			{src: "etc/linux-desktop/syncthing-ui.desktop", dst: "deb/usr/share/applications/syncthing-ui.desktop", perm: 0644},
@@ -139,15 +143,14 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 		},
-		systemdServices: []string{
-			"cmd/stdiscosrv/etc/linux-systemd/stdiscosrv.service",
-		},
+		systemdService: "cmd/stdiscosrv/etc/linux-systemd/stdiscosrv.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "cmd/stdiscosrv/README.md", dst: "deb/usr/share/doc/syncthing-discosrv/README.txt", perm: 0644},
 			{src: "LICENSE", dst: "deb/usr/share/doc/syncthing-discosrv/LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing-discosrv/AUTHORS.txt", perm: 0644},
 			{src: "man/stdiscosrv.1", dst: "deb/usr/share/man/man1/stdiscosrv.1", perm: 0644},
+			{src: "cmd/stdiscosrv/etc/linux-systemd/stdiscosrv.service", dst: "deb/lib/systemd/system/stdiscosrv.service", perm: 0644},
 			{src: "cmd/stdiscosrv/etc/linux-systemd/default", dst: "deb/etc/default/syncthing-discosrv", perm: 0644},
 			{src: "cmd/stdiscosrv/etc/firewall-ufw/stdiscosrv", dst: "deb/etc/ufw/applications.d/stdiscosrv", perm: 0644},
 		},
@@ -168,9 +171,7 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "AUTHORS.txt", perm: 0644},
 		},
-		systemdServices: []string{
-			"cmd/strelaysrv/etc/linux-systemd/strelaysrv.service",
-		},
+		systemdService: "cmd/strelaysrv/etc/linux-systemd/strelaysrv.service",
 		installationFiles: []archiveFile{
 			{src: "{{binary}}", dst: "deb/usr/bin/{{binary}}", perm: 0755},
 			{src: "cmd/strelaysrv/README.md", dst: "deb/usr/share/doc/syncthing-relaysrv/README.txt", perm: 0644},
@@ -178,6 +179,7 @@ var targets = map[string]target{
 			{src: "LICENSE", dst: "deb/usr/share/doc/syncthing-relaysrv/LICENSE.txt", perm: 0644},
 			{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing-relaysrv/AUTHORS.txt", perm: 0644},
 			{src: "man/strelaysrv.1", dst: "deb/usr/share/man/man1/strelaysrv.1", perm: 0644},
+			{src: "cmd/strelaysrv/etc/linux-systemd/strelaysrv.service", dst: "deb/lib/systemd/system/strelaysrv.service", perm: 0644},
 			{src: "cmd/strelaysrv/etc/linux-systemd/default", dst: "deb/etc/default/syncthing-relaysrv", perm: 0644},
 			{src: "cmd/strelaysrv/etc/firewall-ufw/strelaysrv", dst: "deb/etc/ufw/applications.d/strelaysrv", perm: 0644},
 		},
@@ -204,19 +206,7 @@ var targets = map[string]target{
 	},
 }

-// These are repos we need to clone to run "go generate"
-
-type dependencyRepo struct {
-	path   string
-	repo   string
-	commit string
-}
-
-var dependencyRepos = []dependencyRepo{
-	{path: "xdr", repo: "https://github.com/calmh/xdr.git", commit: "08e072f9cb16"},
-}
-
-func init() {
+func initTargets() {
 	all := targets["all"]
 	pkgs, _ := filepath.Glob("cmd/*")
 	for _, pkg := range pkgs {
@@ -225,6 +215,9 @@ func init() {
 			// ignore dotfiles
 			continue
 		}
+		if noupgrade && pkg == "stupgrades" {
+			continue
+		}
 		all.buildPkgs = append(all.buildPkgs, fmt.Sprintf("github.com/syncthing/syncthing/cmd/%s", pkg))
 	}
 	targets["all"] = all
@@ -256,6 +249,8 @@ func main() {
 		}()
 	}

+	initTargets()
+
 	// Invoking build.go with no parameters at all builds everything (incrementally),
 	// which is what you want for maximum error checking during development.
 	if flag.NArg() == 0 {
@@ -278,29 +273,31 @@ func main() {
 }

 func runCommand(cmd string, target target) {
+	var tags []string
+	if noupgrade {
+		tags = []string{"noupgrade"}
+	}
+	tags = append(tags, strings.Fields(extraTags)...)
+
 	switch cmd {
 	case "install":
-		var tags []string
-		if noupgrade {
-			tags = []string{"noupgrade"}
-		}
-		tags = append(tags, strings.Fields(extraTags)...)
 		install(target, tags)
 		metalintShort()

 	case "build":
-		var tags []string
-		if noupgrade {
-			tags = []string{"noupgrade"}
-		}
-		tags = append(tags, strings.Fields(extraTags)...)
 		build(target, tags)

 	case "test":
-		test("github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")
+		test(strings.Fields(extraTags), "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")

 	case "bench":
-		bench("github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")
+		bench(strings.Fields(extraTags), "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/...")
+
+	case "integration":
+		integration(false)
+
+	case "integrationbench":
+		integration(true)

 	case "assets":
 		rebuildAssets()
@@ -308,6 +305,9 @@ func runCommand(cmd string, target target) {
 	case "proto":
 		proto()

+	case "testmocks":
+		testmocks()
+
 	case "translate":
 		translate()

@@ -315,17 +315,14 @@ func runCommand(cmd string, target target) {
 		transifex()

 	case "tar":
-		buildTar(target)
+		buildTar(target, tags)

 	case "zip":
-		buildZip(target)
+		buildZip(target, tags)

 	case "deb":
 		buildDeb(target)

-	case "snap":
-		buildSnap(target)
-
 	case "vet":
 		metalintShort()

@@ -338,6 +335,20 @@ func runCommand(cmd string, target target) {
 	case "version":
 		fmt.Println(getVersion())

+	case "changelog":
+		vers, err := currentAndLatestVersions(numVersions)
+		if err != nil {
+			log.Fatal(err)
+		}
+		for _, ver := range vers {
+			underline := strings.Repeat("=", len(ver))
+			msg, err := tagMessage(ver)
+			if err != nil {
+				log.Fatal(err)
+			}
+			fmt.Printf("%s\n%s\n\n%s\n\n", ver, underline, msg)
+		}
+
 	default:
 		log.Fatalf("Unknown command %q", cmd)
 	}
@@ -356,13 +367,25 @@ func parseFlags() {
 	flag.StringVar(&cc, "cc", os.Getenv("CC"), "Set CC environment variable for `go build`")
 	flag.BoolVar(&debugBinary, "debug-binary", debugBinary, "Create unoptimized binary to use with delve, set -gcflags='-N -l' and omit -ldflags")
 	flag.BoolVar(&coverage, "coverage", coverage, "Write coverage profile of tests to coverage.txt")
+	flag.BoolVar(&long, "long", long, "Run tests without the -short flag")
+	flag.IntVar(&numVersions, "num-versions", numVersions, "Number of versions for changelog command")
+	flag.StringVar(&run, "run", "", "Specify which tests to run")
+	flag.StringVar(&benchRun, "bench", "", "Specify which benchmarks to run")
+	flag.BoolVar(&withNextGenGUI, "with-next-gen-gui", withNextGenGUI, "Also build 'newgui'")
 	flag.Parse()
 }

-func test(pkgs ...string) {
+func test(tags []string, pkgs ...string) {
 	lazyRebuildAssets()

-	args := []string{"test", "-short", "-timeout", timeout, "-tags", "purego"}
+	tags = append(tags, "purego")
+	args := []string{"test", "-tags", strings.Join(tags, " ")}
+	if long {
+		timeout = longTimeout
+	} else {
+		args = append(args, "-short")
+	}
+	args = append(args, "-timeout", timeout)

 	if runtime.GOARCH == "amd64" {
 		switch runtime.GOOS {
@@ -375,15 +398,56 @@ func test(pkgs ...string) {
 		args = append(args, "-covermode", "atomic", "-coverprofile", "coverage.txt", "-coverpkg", strings.Join(pkgs, ","))
 	}

+	args = append(args, runArgs()...)
+
 	runPrint(goCmd, append(args, pkgs...)...)
 }

-func bench(pkgs ...string) {
+func bench(tags []string, pkgs ...string) {
 	lazyRebuildAssets()
-	runPrint(goCmd, append([]string{"test", "-run", "NONE", "-bench", "."}, pkgs...)...)
+	args := append([]string{"test", "-run", "NONE", "-tags", strings.Join(tags, " ")}, benchArgs()...)
+	runPrint(goCmd, append(args, pkgs...)...)
+}
+
+func integration(bench bool) {
+	lazyRebuildAssets()
+	args := []string{"test", "-v", "-timeout", "60m", "-tags"}
+	tags := "purego,integration"
+	if bench {
+		tags += ",benchmark"
+	}
+	args = append(args, tags)
+	args = append(args, runArgs()...)
+	if bench {
+		if run == "" {
+			args = append(args, "-run", "Benchmark")
+		}
+		args = append(args, benchArgs()...)
+	}
+	args = append(args, "./test")
+	fmt.Println(args)
+	runPrint(goCmd, args...)
+}
+
+func runArgs() []string {
+	if run == "" {
+		return nil
+	}
+	return []string{"-run", run}
+}
+
+func benchArgs() []string {
+	if benchRun == "" {
+		return []string{"-bench", "."}
+	}
+	return []string{"-bench", benchRun}
 }

 func install(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()

 	tags = append(target.tags, tags...)
@@ -394,9 +458,7 @@ func install(target target, tags []string) {
 	}
 	os.Setenv("GOBIN", filepath.Join(cwd, "bin"))

-	os.Setenv("GOOS", goos)
-	os.Setenv("GOARCH", goarch)
-	os.Setenv("CC", cc)
+	setBuildEnvVars()

 	// On Windows generate a special file which the Go compiler will
 	// automatically use when generating Windows binaries to set things like
@@ -409,23 +471,22 @@ func install(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}

-	for _, pkg := range target.buildPkgs {
-		args := []string{"install", "-v"}
-		args = appendParameters(args, tags, pkg)
-
-		runPrint(goCmd, args...)
-	}
+	args := []string{"install", "-v"}
+	args = appendParameters(args, tags, target.buildPkgs...)
+	runPrint(goCmd, args...)
 }

 func build(target target, tags []string) {
+	if (target.name == "syncthing" || target.name == "") && !withNextGenGUI {
+		log.Println("Notice: Next generation GUI will not be built; see --with-next-gen-gui.")
+	}
+
 	lazyRebuildAssets()
 	tags = append(target.tags, tags...)

 	rmr(target.BinaryName())

-	os.Setenv("GOOS", goos)
-	os.Setenv("GOARCH", goarch)
-	os.Setenv("CC", cc)
+	setBuildEnvVars()

 	// On Windows generate a special file which the Go compiler will
 	// automatically use when generating Windows binaries to set things like
@@ -442,15 +503,25 @@ func build(target target, tags []string) {
 		defer shouldCleanupSyso(sysoPath)
 	}

-	for _, pkg := range target.buildPkgs {
-		args := []string{"build", "-v"}
-		args = appendParameters(args, tags, pkg)
+	args := []string{"build", "-v"}
+	args = appendParameters(args, tags, target.buildPkgs...)
+	runPrint(goCmd, args...)
+}

-		runPrint(goCmd, args...)
+func setBuildEnvVars() {
+	os.Setenv("GOOS", goos)
+	os.Setenv("GOARCH", goarch)
+	os.Setenv("CC", cc)
+	if os.Getenv("CGO_ENABLED") == "" {
+		switch goos {
+		case "darwin", "solaris":
+		default:
+			os.Setenv("CGO_ENABLED", "0")
+		}
 	}
 }

-func appendParameters(args []string, tags []string, pkg string) []string {
+func appendParameters(args []string, tags []string, pkgs ...string) []string {
 	if pkgdir != "" {
 		args = append(args, "-pkgdir", pkgdir)
 	}
@@ -466,26 +537,27 @@ func appendParameters(args []string, tags []string, pkg string) []string {

 	if !debugBinary {
 		// Regular binaries get version tagged and skip some debug symbols
-		args = append(args, "-ldflags", ldflags(path.Base(pkg)))
+		args = append(args, "-trimpath", "-ldflags", ldflags(tags))
 	} else {
 		// -gcflags to disable optimizations and inlining. Skip -ldflags
 		// because `Could not launch program: decoding dwarf section info at
 		// offset 0x0: too short` on 'dlv exec ...' see
-		// https://github.com/derekparker/delve/issues/79
-		args = append(args, "-gcflags", "-N -l")
+		// https://github.com/go-delve/delve/issues/79
+		args = append(args, "-gcflags", "all=-N -l")
 	}

-	return append(args, pkg)
+	return append(args, pkgs...)
 }

-func buildTar(target target) {
+func buildTar(target target, tags []string) {
 	name := archiveName(target)
 	filename := name + ".tar.gz"

-	var tags []string
-	if noupgrade {
-		tags = []string{"noupgrade"}
-		name += "-noupgrade"
+	for _, tag := range tags {
+		if tag == "noupgrade" {
+			name += "-noupgrade"
+			break
+		}
 	}

 	build(target, tags)
@@ -501,14 +573,15 @@ func buildTar(target target) {
 	fmt.Println(filename)
 }

-func buildZip(target target) {
+func buildZip(target target, tags []string) {
 	name := archiveName(target)
 	filename := name + ".zip"

-	var tags []string
-	if noupgrade {
-		tags = []string{"noupgrade"}
-		name += "-noupgrade"
+	for _, tag := range tags {
+		if tag == "noupgrade" {
+			name += "-noupgrade"
+			break
+		}
 	}

 	build(target, tags)
@@ -576,11 +649,13 @@ func buildDeb(target target) {
 	for _, dep := range target.debdeps {
 		args = append(args, "-d", dep)
 	}
-	for _, service := range target.systemdServices {
-		args = append(args, "--deb-systemd", service)
-	}
-	if target.debpost != "" {
-		args = append(args, "--after-upgrade", target.debpost)
+	if target.systemdService != "" {
+		debpost, err := createPostInstScript(target)
+		defer os.Remove(debpost)
+		if err != nil {
+			log.Fatal(err)
+		}
+		args = append(args, "--after-upgrade", debpost)
 	}
 	if target.debpre != "" {
 		args = append(args, "--before-install", target.debpre)
@@ -588,64 +663,55 @@ func buildDeb(target target) {
 	runPrint("fpm", args...)
 }

-func buildSnap(target target) {
-	os.RemoveAll("snap")
-
-	tmpl, err := template.ParseFiles("snapcraft.yaml.template")
+func createPostInstScript(target target) (string, error) {
+	scriptname := filepath.Join("script", "deb-post-inst.template")
+	t, err := template.ParseFiles(scriptname)
 	if err != nil {
-		log.Fatal(err)
+		return "", err
 	}
-	f, err := os.Create("snapcraft.yaml")
-	defer f.Close()
+	scriptname = strings.TrimSuffix(scriptname, ".template")
+	w, err := os.Create(scriptname)
 	if err != nil {
-		log.Fatal(err)
+		return "", err
 	}
-
-	snaparch := goarch
-	if snaparch == "armhf" {
-		goarch = "arm"
-	} else if snaparch == "i386" {
-		goarch = "386"
+	defer w.Close()
+	if err = t.Execute(w, struct {
+		Service, Command string
+	}{
+		target.systemdService, target.binaryName,
+	}); err != nil {
+		return "", err
 	}
-	snapver := version
-	if strings.HasPrefix(snapver, "v") {
-		snapver = snapver[1:]
-	}
-	snapgrade := "devel"
-	if matched, _ := regexp.MatchString(`^\d+\.\d+\.\d+(-rc.\d+)?$`, snapver); matched {
-		snapgrade = "stable"
-	}
-	err = tmpl.Execute(f, map[string]string{
-		"Version":            snapver,
-		"HostArchitecture":   runtime.GOARCH,
-		"TargetArchitecture": snaparch,
-		"Grade":              snapgrade,
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-	runPrint("snapcraft", "clean")
-	build(target, []string{"noupgrade"})
-	runPrint("snapcraft")
+	return scriptname, nil
 }

 func shouldBuildSyso(dir string) (string, error) {
 	type M map[string]interface{}
-	major, minor, patch, build := semanticVersion()
+	version := getVersion()
+	version = strings.TrimPrefix(version, "v")
+	major, minor, patch := semanticVersion()
 	bs, err := json.Marshal(M{
 		"FixedFileInfo": M{
 			"FileVersion": M{
 				"Major": major,
 				"Minor": minor,
 				"Patch": patch,
-				"Build": build,
+			},
+			"ProductVersion": M{
+				"Major": major,
+				"Minor": minor,
+				"Patch": patch,
 			},
 		},
 		"StringFileInfo": M{
-			"FileDescription": "Open Source Continuous File Synchronization",
-			"LegalCopyright":  "The Syncthing Authors",
-			"ProductVersion":  getVersion(),
-			"ProductName":     "Syncthing",
+			"CompanyName":      "The Syncthing Authors",
+			"FileDescription":  "Syncthing - Open Source Continuous File Synchronization",
+			"FileVersion":      version,
+			"InternalName":     "syncthing",
+			"LegalCopyright":   "The Syncthing Authors",
+			"OriginalFilename": "syncthing",
+			"ProductName":      "Syncthing",
+			"ProductVersion":   version,
 		},
 		"IconPath": "assets/logo.ico",
 	})
@@ -732,15 +798,50 @@ func listFiles(dir string) []string {

 func rebuildAssets() {
 	os.Setenv("SOURCE_DATE_EPOCH", fmt.Sprint(buildStamp()))
-	runPrint(goCmd, "generate", "github.com/syncthing/syncthing/lib/auto", "github.com/syncthing/syncthing/cmd/strelaypoolsrv/auto")
+	runPrint(goCmd, "generate", "github.com/syncthing/syncthing/lib/api/auto", "github.com/syncthing/syncthing/cmd/strelaypoolsrv/auto")
 }

 func lazyRebuildAssets() {
-	if shouldRebuildAssets("lib/auto/gui.files.go", "gui") || shouldRebuildAssets("cmd/strelaypoolsrv/auto/gui.files.go", "cmd/strelaypoolsrv/auto/gui") {
+	shouldRebuild := shouldRebuildAssets("lib/api/auto/gui.files.go", "gui") ||
+		shouldRebuildAssets("cmd/strelaypoolsrv/auto/gui.files.go", "cmd/strelaypoolsrv/gui")
+
+	if withNextGenGUI {
+		shouldRebuild = buildNextGenGUI() || shouldRebuild
+	}
+
+	if shouldRebuild {
 		rebuildAssets()
 	}
 }

+func buildNextGenGUI() bool {
+	// Check if we need to run the npm process, and if so also set the flag
+	// to rebuild Go assets afterwards. The index.html is regenerated every
+	// time by the build process. This assumes the new GUI ends up in
+	// next-gen-gui/dist/next-gen-gui.
+
+	if !shouldRebuildAssets("gui/next-gen-gui/index.html", "next-gen-gui") {
+		// The GUI is up to date.
+		return false
+	}
+
+	runPrintInDir("next-gen-gui", "npm", "install")
+	runPrintInDir("next-gen-gui", "npm", "run", "build", "--", "--prod", "--subresource-integrity")
+
+	rmr("gui/tech-ui")
+
+	for _, src := range listFiles("next-gen-gui/dist") {
+		rel, _ := filepath.Rel("next-gen-gui/dist", src)
+		dst := filepath.Join("gui", rel)
+		if err := copyFile(src, dst, 0644); err != nil {
+			fmt.Println("copy:", err)
+			os.Exit(1)
+		}
+	}
+
+	return true
+}
+
 func shouldRebuildAssets(target, srcdir string) bool {
 	info, err := os.Stat(target)
 	if err != nil {
@@ -769,22 +870,35 @@ func shouldRebuildAssets(target, srcdir string) bool {

 func proto() {
 	pv := protobufVersion()
-	dependencyRepos = append(dependencyRepos,
-		dependencyRepo{path: "protobuf", repo: "https://github.com/gogo/protobuf.git", commit: pv},
-	)
+	repo := "https://github.com/gogo/protobuf.git"
+	path := filepath.Join("repos", "protobuf")

 	runPrint(goCmd, "get", fmt.Sprintf("github.com/gogo/protobuf/protoc-gen-gogofast@%v", pv))
 	os.MkdirAll("repos", 0755)
-	for _, dep := range dependencyRepos {
-		path := filepath.Join("repos", dep.path)
-		if _, err := os.Stat(path); err != nil {
-			runPrintInDir("repos", "git", "clone", dep.repo, dep.path)
-		} else {
-			runPrintInDir(path, "git", "fetch")
-		}
-		runPrintInDir(path, "git", "checkout", dep.commit)
+
+	if _, err := os.Stat(path); err != nil {
+		runPrint("git", "clone", repo, path)
+	} else {
+		runPrintInDir(path, "git", "fetch")
 	}
-	runPrint(goCmd, "generate", "github.com/syncthing/syncthing/lib/...", "github.com/syncthing/syncthing/cmd/stdiscosrv")
+	runPrintInDir(path, "git", "checkout", pv)
+
+	runPrint(goCmd, "generate", "github.com/syncthing/syncthing/cmd/stdiscosrv")
+	runPrint(goCmd, "generate", "proto/generate.go")
+}
+
+func testmocks() {
+	args := []string{
+		"generate",
+		"github.com/syncthing/syncthing/lib/config",
+		"github.com/syncthing/syncthing/lib/connections",
+		"github.com/syncthing/syncthing/lib/discover",
+		"github.com/syncthing/syncthing/lib/events",
+		"github.com/syncthing/syncthing/lib/logger",
+		"github.com/syncthing/syncthing/lib/model",
+		"github.com/syncthing/syncthing/lib/protocol",
+	}
+	runPrint(goCmd, args...)
 }

 func translate() {
@@ -803,14 +917,14 @@ func transifex() {
 	runPrint(goCmd, "run", "../../../../script/transifexdl.go")
 }

-func ldflags(program string) string {
+func ldflags(tags []string) string {
 	b := new(strings.Builder)
 	b.WriteString("-w")
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Version=%s", version)
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Stamp=%d", buildStamp())
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.User=%s", buildUser())
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Host=%s", buildHost())
-	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Program=%s", program)
+	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Tags=%s", strings.Join(tags, ","))
 	if v := os.Getenv("EXTRA_LDFLAGS"); v != "" {
 		fmt.Fprintf(b, " %s", v)
 	}
@@ -835,15 +949,39 @@ func getReleaseVersion() (string, error) {
 }

 func getGitVersion() (string, error) {
-	v, err := runError("git", "describe", "--always", "--dirty")
+	// The current version as Git sees it
+	bs, err := runError("git", "describe", "--always", "--dirty", "--abbrev=8")
 	if err != nil {
 		return "", err
 	}
-	v = versionRe.ReplaceAllFunc(v, func(s []byte) []byte {
-		s[0] = '+'
-		return s
-	})
-	return string(v), nil
+	vcur := string(bs)
+
+	// The closest current tag name
+	bs, err = runError("git", "describe", "--always", "--abbrev=0")
+	if err != nil {
+		return "", err
+	}
+	v0 := string(bs)
+
+	// To be more semantic-versionish and ensure proper ordering in our
+	// upgrade process, we make sure there's only one hypen in the version.
+
+	versionRe := regexp.MustCompile(`-([0-9]{1,3}-g[0-9a-f]{5,10}(-dirty)?)`)
+	if m := versionRe.FindStringSubmatch(vcur); len(m) > 0 {
+		suffix := strings.ReplaceAll(m[1], "-", ".")
+
+		if strings.Contains(v0, "-") {
+			// We're based of a tag with a prerelease string. We can just
+			// add our dev stuff directly.
+			return fmt.Sprintf("%s.dev.%s", v0, suffix), nil
+		}
+
+		// We're based on a release version. We need to bump the patch
+		// version and then add a -dev prerelease string.
+		next := nextPatchVersion(v0)
+		return fmt.Sprintf("%s-dev.%s", next, suffix), nil
+	}
+	return vcur, nil
 }

 func getVersion() string {
@@ -864,22 +1002,18 @@ func getVersion() string {
 	return "unknown-dev"
 }

-func semanticVersion() (major, minor, patch, build int) {
-	r := regexp.MustCompile(`v(?P<Major>\d+)\.(?P<Minor>\d+).(?P<Patch>\d+).*\+(?P<CommitsAhead>\d+)`)
+func semanticVersion() (major, minor, patch int) {
+	r := regexp.MustCompile(`v(\d+)\.(\d+).(\d+)`)
 	matches := r.FindStringSubmatch(getVersion())
-	if len(matches) != 5 {
-		return 0, 0, 0, 0
+	if len(matches) != 4 {
+		return 0, 0, 0
 	}

-	var ints [4]int
-	for i := 1; i < 5; i++ {
-		value, err := strconv.Atoi(matches[i])
-		if err != nil {
-			return 0, 0, 0, 0
-		}
-		ints[i-1] = value
+	var ints [3]int
+	for i, s := range matches[1:] {
+		ints[i], _ = strconv.Atoi(s)
 	}
-	return ints[0], ints[1], ints[2], ints[3]
+	return ints[0], ints[1], ints[2]
 }

 func getBranchSuffix() string {
@@ -918,7 +1052,7 @@ func getBranchSuffix() string {

 	branch = parts[len(parts)-1]
 	switch branch {
-	case "master", "release":
+	case "master", "release", "main":
 		// these are not special
 		return ""
 	}
@@ -1194,7 +1328,7 @@ func macosCodesign(file string) {
 	}

 	if id := os.Getenv("CODESIGN_IDENTITY"); id != "" {
-		bs, err := runError("codesign", "-s", id, file)
+		bs, err := runError("codesign", "--options=runtime", "-s", id, file)
 		if err != nil {
 			log.Println("Codesign: signing failed:", string(bs))
 			return
@@ -1250,32 +1384,6 @@ func metalintShort() {
 	runPrint(goCmd, "test", "-short", "-run", "Metalint", "./meta")
 }

-func temporaryBuildDir() (string, error) {
-	// The base of our temp dir is "syncthing-xxxxxxxx" where the x:es
-	// are eight bytes from the sha256 of our working directory. We do
-	// this because we want a name in the global temp dir that doesn't
-	// conflict with someone else building syncthing on the same
-	// machine, yet is persistent between runs from the same source
-	// directory.
-	wd, err := os.Getwd()
-	if err != nil {
-		return "", err
-	}
-	hash := sha256.Sum256([]byte(wd))
-	base := fmt.Sprintf("syncthing-%x", hash[:4])
-
-	// The temp dir is taken from $STTMPDIR if set, otherwise the system
-	// default (potentially infrluenced by $TMPDIR on unixes).
-	var tmpDir string
-	if t := os.Getenv("STTMPDIR"); t != "" {
-		tmpDir = t
-	} else {
-		tmpDir = os.TempDir()
-	}
-
-	return filepath.Join(tmpDir, base), nil
-}
-
 func (t target) BinaryName() string {
 	if goos == "windows" {
 		return t.binaryName + ".exe"
@@ -1290,3 +1398,70 @@ func protobufVersion() string {
 	}
 	return string(bs)
 }
+
+func currentAndLatestVersions(n int) ([]string, error) {
+	bs, err := runError("git", "tag", "--sort", "taggerdate")
+	if err != nil {
+		return nil, err
+	}
+
+	lines := strings.Split(string(bs), "\n")
+	reverseStrings(lines)
+
+	// The one at the head is the latest version. We always keep that one.
+	// Then we filter out remaining ones with dashes (pre-releases etc).
+
+	latest := lines[:1]
+	nonPres := filterStrings(lines[1:], func(s string) bool { return !strings.Contains(s, "-") })
+	vers := append(latest, nonPres...)
+	return vers[:n], nil
+}
+
+func reverseStrings(ss []string) {
+	for i := 0; i < len(ss)/2; i++ {
+		ss[i], ss[len(ss)-1-i] = ss[len(ss)-1-i], ss[i]
+	}
+}
+
+func filterStrings(ss []string, op func(string) bool) []string {
+	n := ss[:0]
+	for _, s := range ss {
+		if op(s) {
+			n = append(n, s)
+		}
+	}
+	return n
+}
+
+func tagMessage(tag string) (string, error) {
+	hash, err := runError("git", "rev-parse", tag)
+	if err != nil {
+		return "", err
+	}
+	obj, err := runError("git", "cat-file", "-p", string(hash))
+	if err != nil {
+		return "", err
+	}
+	return trimTagMessage(string(obj), tag), nil
+}
+
+func trimTagMessage(msg, tag string) string {
+	firstBlank := strings.Index(msg, "\n\n")
+	if firstBlank > 0 {
+		msg = msg[firstBlank+2:]
+	}
+	msg = strings.TrimPrefix(msg, tag)
+	beginSig := strings.Index(msg, "-----BEGIN PGP")
+	if beginSig > 0 {
+		msg = msg[:beginSig]
+	}
+	return strings.TrimSpace(msg)
+}
+
+func nextPatchVersion(ver string) string {
+	parts := strings.SplitN(ver, "-", 2)
+	digits := strings.Split(parts[0], ".")
+	n, _ := strconv.Atoi(digits[len(digits)-1])
+	digits[len(digits)-1] = strconv.Itoa(n + 1)
+	return strings.Join(digits, ".")
+}
--- a/build.ps1
+++ b/build.ps1
@@ -0,0 +1,20 @@
+function build {
+    go run build.go @args
+}
+
+$cmd, $rest = $args
+switch ($cmd) {
+    "test" {
+        $env:LOGGER_DISCARD=1
+        build test
+    }
+
+    "bench" {
+        $env:LOGGER_DISCARD=1
+        build bench
+    }
+
+    default {
+        build @rest
+    }
+}
--- a/build.sh
+++ b/build.sh
@@ -2,8 +2,6 @@
 set -euo pipefail
 IFS=$'\n\t'

-STTRACE=${STTRACE:-}
-
 script() {
 	name="$1"
 	shift
@@ -15,88 +13,23 @@ build() {
 }

 case "${1:-default}" in
-	default)
-		build
-		;;
-
-	clean)
-		build "$@"
-		;;
-
-	tar)
-		build "$@"
-		;;
-
-	assets)
-		build "$@"
-		;;
-
-	xdr)
-		build "$@"
-		;;
-
-	translate)
-		build "$@"
-		;;
-
-	deb)
-		build "$@"
-		;;
-
-	setup)
-		build "$@"
-		;;
-
 	test)
 		LOGGER_DISCARD=1 build test
 		;;

 	bench)
-		LOGGER_DISCARD=1 build bench | script benchfilter
+		LOGGER_DISCARD=1 build bench
 		;;

 	prerelease)
-		go run script/authors.go
+		script authors
 		build transifex
 		pushd man ; ./refresh.sh ; popd
 		git add -A gui man AUTHORS
 		git commit -m 'gui, man, authors: Update docs, translations, and contributors'
 		;;

-	noupgrade)
-		build -no-upgrade tar
-		;;
-
-	all)
-		platforms=(
-			darwin-amd64 dragonfly-amd64 freebsd-amd64 linux-amd64 netbsd-amd64 openbsd-amd64 solaris-amd64 windows-amd64
-			freebsd-386 linux-386 netbsd-386 openbsd-386 windows-386
-			linux-arm linux-arm64 linux-ppc64 linux-ppc64le
-		)
-
-		for plat in "${platforms[@]}"; do
-			echo Building "$plat"
-
-			goos="${plat%-*}"
-			goarch="${plat#*-}"
-			dist="tar"
-
-			if [[ $goos == "windows" ]]; then
-				dist="zip"
-			fi
-
-			build -goos "$goos" -goarch "$goarch" "$dist"
-			echo
-		done
-		;;
-
-	test-xunit)
-
-		(GOPATH="$(pwd)/Godeps/_workspace:$GOPATH" go test -v -race ./lib/... ./cmd/... || true) > tests.out
-		go2xunit -output tests.xml -fail < tests.out
-		;;
-
 	*)
-		echo "Unknown build command $1"
+		build "$@"
 		;;
 esac
--- a/cmd/stcli/client.go
+++ b/cmd/stcli/client.go
@@ -1,96 +0,0 @@
-// Copyright (C) 2019 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"bytes"
-	"context"
-	"crypto/tls"
-	"errors"
-	"fmt"
-	"net"
-	"net/http"
-	"strings"
-
-	"github.com/syncthing/syncthing/lib/config"
-)
-
-type APIClient struct {
-	http.Client
-	cfg    config.GUIConfiguration
-	apikey string
-}
-
-func getClient(cfg config.GUIConfiguration) *APIClient {
-	httpClient := http.Client{
-		Transport: &http.Transport{
-			TLSClientConfig: &tls.Config{
-				InsecureSkipVerify: true,
-			},
-			DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
-				return net.Dial(cfg.Network(), cfg.Address())
-			},
-		},
-	}
-	return &APIClient{
-		Client: httpClient,
-		cfg:    cfg,
-		apikey: cfg.APIKey,
-	}
-}
-
-func (c *APIClient) Endpoint() string {
-	if c.cfg.Network() == "unix" {
-		return "http://unix/"
-	}
-	url := c.cfg.URL()
-	if !strings.HasSuffix(url, "/") {
-		url += "/"
-	}
-	return url
-}
-
-func (c *APIClient) Do(req *http.Request) (*http.Response, error) {
-	req.Header.Set("X-API-Key", c.apikey)
-	resp, err := c.Client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	return resp, checkResponse(resp)
-}
-
-func (c *APIClient) Get(url string) (*http.Response, error) {
-	request, err := http.NewRequest("GET", c.Endpoint()+"rest/"+url, nil)
-	if err != nil {
-		return nil, err
-	}
-	return c.Do(request)
-}
-
-func (c *APIClient) Post(url, body string) (*http.Response, error) {
-	request, err := http.NewRequest("POST", c.Endpoint()+"rest/"+url, bytes.NewBufferString(body))
-	if err != nil {
-		return nil, err
-	}
-	return c.Do(request)
-}
-
-func checkResponse(response *http.Response) error {
-	if response.StatusCode == 404 {
-		return errors.New("invalid endpoint or API call")
-	} else if response.StatusCode == 403 {
-		return errors.New("invalid API key")
-	} else if response.StatusCode != 200 {
-		data, err := responseToBArray(response)
-		if err != nil {
-			return err
-		}
-		body := strings.TrimSpace(string(data))
-		return fmt.Errorf("unexpected HTTP status returned: %s\n%s", response.Status, body)
-	}
-	return nil
-}
--- a/cmd/stcli/main.go
+++ b/cmd/stcli/main.go
@@ -1,192 +0,0 @@
-// Copyright (C) 2019 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"bufio"
-	"crypto/tls"
-	"encoding/json"
-	"flag"
-	"log"
-	"os"
-	"reflect"
-
-	"github.com/AudriusButkevicius/recli"
-	"github.com/flynn-archive/go-shlex"
-	"github.com/mattn/go-isatty"
-	"github.com/pkg/errors"
-	"github.com/syncthing/syncthing/lib/build"
-	"github.com/syncthing/syncthing/lib/config"
-	"github.com/syncthing/syncthing/lib/events"
-	"github.com/syncthing/syncthing/lib/locations"
-	"github.com/syncthing/syncthing/lib/protocol"
-	"github.com/urfave/cli"
-)
-
-func main() {
-	// This is somewhat a hack around a chicken and egg problem.
-	// We need to set the home directory and potentially other flags to know where the syncthing instance is running
-	// in order to get it's config ... which we then use to construct the actual CLI ... at which point it's too late
-	// to add flags there...
-	homeBaseDir := locations.GetBaseDir(locations.ConfigBaseDir)
-	guiCfg := config.GUIConfiguration{}
-
-	flags := flag.NewFlagSet("", flag.ContinueOnError)
-	flags.StringVar(&guiCfg.RawAddress, "gui-address", guiCfg.RawAddress, "Override GUI address (e.g. \"http://192.0.2.42:8443\")")
-	flags.StringVar(&guiCfg.APIKey, "gui-apikey", guiCfg.APIKey, "Override GUI API key")
-	flags.StringVar(&homeBaseDir, "home", homeBaseDir, "Set configuration directory")
-
-	// Implement the same flags at the lower CLI, with the same default values (pre-parse), but do nothing with them.
-	// This is so that we could reuse os.Args
-	fakeFlags := []cli.Flag{
-		cli.StringFlag{
-			Name:  "gui-address",
-			Value: guiCfg.RawAddress,
-			Usage: "Override GUI address (e.g. \"http://192.0.2.42:8443\")",
-		},
-		cli.StringFlag{
-			Name:  "gui-apikey",
-			Value: guiCfg.APIKey,
-			Usage: "Override GUI API key",
-		},
-		cli.StringFlag{
-			Name:  "home",
-			Value: homeBaseDir,
-			Usage: "Set configuration directory",
-		},
-	}
-
-	// Do not print usage of these flags, and ignore errors as this can't understand plenty of things
-	flags.Usage = func() {}
-	_ = flags.Parse(os.Args[1:])
-
-	// Now if the API key and address is not provided (we are not connecting to a remote instance),
-	// try to rip it out of the config.
-	if guiCfg.RawAddress == "" && guiCfg.APIKey == "" {
-		// Update the base directory
-		err := locations.SetBaseDir(locations.ConfigBaseDir, homeBaseDir)
-		if err != nil {
-			log.Fatal(errors.Wrap(err, "setting home"))
-		}
-
-		// Load the certs and get the ID
-		cert, err := tls.LoadX509KeyPair(
-			locations.Get(locations.CertFile),
-			locations.Get(locations.KeyFile),
-		)
-		if err != nil {
-			log.Fatal(errors.Wrap(err, "reading device ID"))
-		}
-
-		myID := protocol.NewDeviceID(cert.Certificate[0])
-
-		// Load the config
-		cfg, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
-		if err != nil {
-			log.Fatalln(errors.Wrap(err, "loading config"))
-		}
-
-		guiCfg = cfg.GUI()
-	} else if guiCfg.Address() == "" || guiCfg.APIKey == "" {
-		log.Fatalln("Both -gui-address and -gui-apikey should be specified")
-	}
-
-	if guiCfg.Address() == "" {
-		log.Fatalln("Could not find GUI Address")
-	}
-
-	if guiCfg.APIKey == "" {
-		log.Fatalln("Could not find GUI API key")
-	}
-
-	client := getClient(guiCfg)
-
-	cfg, err := getConfig(client)
-	original := cfg.Copy()
-	if err != nil {
-		log.Fatalln(errors.Wrap(err, "getting config"))
-	}
-
-	// Copy the config and set the default flags
-	recliCfg := recli.DefaultConfig
-	recliCfg.IDTag.Name = "xml"
-	recliCfg.SkipTag.Name = "json"
-
-	commands, err := recli.New(recliCfg).Construct(&cfg)
-	if err != nil {
-		log.Fatalln(errors.Wrap(err, "config reflect"))
-	}
-
-	// Construct the actual CLI
-	app := cli.NewApp()
-	app.Name = "stcli"
-	app.HelpName = app.Name
-	app.Author = "The Syncthing Authors"
-	app.Usage = "Syncthing command line interface"
-	app.Version = build.Version
-	app.Flags = fakeFlags
-	app.Metadata = map[string]interface{}{
-		"client": client,
-	}
-	app.Commands = []cli.Command{
-		{
-			Name:        "config",
-			HideHelp:    true,
-			Usage:       "Configuration modification command group",
-			Subcommands: commands,
-		},
-		showCommand,
-		operationCommand,
-		errorsCommand,
-	}
-
-	tty := isatty.IsTerminal(os.Stdin.Fd()) || isatty.IsCygwinTerminal(os.Stdin.Fd())
-	if !tty {
-		// Not a TTY, consume from stdin
-		scanner := bufio.NewScanner(os.Stdin)
-		for scanner.Scan() {
-			input, err := shlex.Split(scanner.Text())
-			if err != nil {
-				log.Fatalln(errors.Wrap(err, "parsing input"))
-			}
-			if len(input) == 0 {
-				continue
-			}
-			err = app.Run(append(os.Args, input...))
-			if err != nil {
-				log.Fatalln(err)
-			}
-		}
-		err = scanner.Err()
-		if err != nil {
-			log.Fatalln(err)
-		}
-	} else {
-		err = app.Run(os.Args)
-		if err != nil {
-			log.Fatalln(err)
-		}
-	}
-
-	if !reflect.DeepEqual(cfg, original) {
-		body, err := json.MarshalIndent(cfg, "", "  ")
-		if err != nil {
-			log.Fatalln(err)
-		}
-		resp, err := client.Post("system/config", string(body))
-		if err != nil {
-			log.Fatalln(err)
-		}
-		if resp.StatusCode != 200 {
-			body, err := responseToBArray(resp)
-			if err != nil {
-				log.Fatalln(err)
-			}
-			log.Fatalln(string(body))
-		}
-	}
-}
--- a/cmd/stcompdirs/main.go
+++ b/cmd/stcompdirs/main.go
@@ -7,7 +7,6 @@
 package main

 import (
-	"crypto/md5"
 	"errors"
 	"flag"
 	"fmt"
@@ -15,6 +14,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+
+	"github.com/syncthing/syncthing/lib/sha256"
 )

 func main() {
@@ -74,7 +75,7 @@ type fileInfo struct {
 	name string
 	mode os.FileMode
 	mod  int64
-	hash [16]byte
+	hash [sha256.Size]byte
 }

 func (f fileInfo) String() string {
@@ -106,11 +107,7 @@ func startWalker(dir string, res chan<- fileInfo, abort <-chan struct{}) chan er
 			if err != nil {
 				return err
 			}
-			h := md5.New()
-			h.Write([]byte(tgt))
-			hash := h.Sum(nil)
-
-			copy(f.hash[:], hash)
+			f.hash = sha256.Sum256([]byte(tgt))
 		} else if info.IsDir() {
 			f = fileInfo{
 				name: rn,
@@ -123,7 +120,7 @@ func startWalker(dir string, res chan<- fileInfo, abort <-chan struct{}) chan er
 				mode: info.Mode(),
 				mod:  info.ModTime().Unix(),
 			}
-			sum, err := md5file(path)
+			sum, err := sha256file(path)
 			if err != nil {
 				return err
 			}
@@ -150,14 +147,14 @@ func startWalker(dir string, res chan<- fileInfo, abort <-chan struct{}) chan er
 	return errc
 }

-func md5file(fname string) (hash [16]byte, err error) {
+func sha256file(fname string) (hash [sha256.Size]byte, err error) {
 	f, err := os.Open(fname)
 	if err != nil {
 		return
 	}
 	defer f.Close()

-	h := md5.New()
+	h := sha256.New()
 	io.Copy(h, f)
 	hb := h.Sum(nil)
 	copy(hash[:], hb)
--- a/cmd/stcrashreceiver/main.go
+++ b/cmd/stcrashreceiver/main.go
@@ -0,0 +1,126 @@
+// Copyright (C) 2019 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+// Command stcrashreceiver is a trivial HTTP server that allows two things:
+//
+// - uploading files (crash reports) named like a SHA256 hash using a PUT request
+// - checking whether such file exists using a HEAD request
+//
+// Typically this should be deployed behind something that manages HTTPS.
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/syncthing/syncthing/lib/sha256"
+	"github.com/syncthing/syncthing/lib/ur"
+
+	raven "github.com/getsentry/raven-go"
+)
+
+const maxRequestSize = 1 << 20 // 1 MiB
+
+func main() {
+	dir := flag.String("dir", ".", "Parent directory to store crash and failure reports in")
+	dsn := flag.String("dsn", "", "Sentry DSN")
+	listen := flag.String("listen", ":22039", "HTTP listen address")
+	flag.Parse()
+
+	mux := http.NewServeMux()
+
+	cr := &crashReceiver{
+		dir: filepath.Join(*dir, "crash_reports"),
+		dsn: *dsn,
+	}
+	mux.Handle("/", cr)
+
+	if *dsn != "" {
+		mux.HandleFunc("/newcrash/failure", handleFailureFn(*dsn, filepath.Join(*dir, "failure_reports")))
+	}
+
+	log.SetOutput(os.Stdout)
+	if err := http.ListenAndServe(*listen, mux); err != nil {
+		log.Fatalln("HTTP serve:", err)
+	}
+}
+
+func handleFailureFn(dsn, failureDir string) func(w http.ResponseWriter, req *http.Request) {
+	return func(w http.ResponseWriter, req *http.Request) {
+		lr := io.LimitReader(req.Body, maxRequestSize)
+		bs, err := ioutil.ReadAll(lr)
+		req.Body.Close()
+		if err != nil {
+			http.Error(w, err.Error(), 500)
+			return
+		}
+
+		var reports []ur.FailureReport
+		err = json.Unmarshal(bs, &reports)
+		if err != nil {
+			http.Error(w, err.Error(), 400)
+			return
+		}
+		if len(reports) == 0 {
+			// Shouldn't happen
+			log.Printf("Got zero failure reports")
+			return
+		}
+
+		version, err := parseVersion(reports[0].Version)
+		if err != nil {
+			http.Error(w, err.Error(), 400)
+			return
+		}
+		for _, r := range reports {
+			pkt := packet(version, "failure")
+			pkt.Message = r.Description
+			pkt.Extra = raven.Extra{
+				"count": r.Count,
+			}
+			for k, v := range r.Extra {
+				pkt.Extra[k] = v
+			}
+			if len(r.Goroutines) != 0 {
+				url, err := saveFailureWithGoroutines(r.FailureData, failureDir)
+				if err != nil {
+					log.Println("Saving failure report:", err)
+					http.Error(w, "Internal server error", http.StatusInternalServerError)
+					return
+				}
+				pkt.Extra["goroutinesURL"] = url
+			}
+			message := sanitizeMessageLDB(r.Description)
+			pkt.Fingerprint = []string{message}
+
+			if err := sendReport(dsn, pkt, userIDFor(req)); err != nil {
+				log.Println("Failed to send failure report:", err)
+			} else {
+				log.Println("Sent failure report:", r.Description)
+			}
+		}
+	}
+}
+
+func saveFailureWithGoroutines(data ur.FailureData, failureDir string) (string, error) {
+	bs := make([]byte, len(data.Description)+len(data.Goroutines))
+	copy(bs, data.Description)
+	copy(bs[len(data.Description):], data.Goroutines)
+	id := fmt.Sprintf("%x", sha256.Sum256(bs))
+	path := fullPathCompressed(failureDir, id)
+	err := compressAndWrite(bs, path)
+	if err != nil {
+		return "", err
+	}
+	return reportServer + path, nil
+}
--- a/cmd/stcrashreceiver/sentry.go
+++ b/cmd/stcrashreceiver/sentry.go
@@ -31,17 +31,15 @@ var (
 	clientsMut sync.Mutex
 )

-func sendReport(dsn, path string, report []byte) error {
-	pkt, err := parseReport(path, report)
-	if err != nil {
-		return err
-	}
+func sendReport(dsn string, pkt *raven.Packet, userID string) error {
+	pkt.Interfaces = append(pkt.Interfaces, &raven.User{ID: userID})

 	clientsMut.Lock()
 	defer clientsMut.Unlock()

 	cli, ok := clients[dsn]
 	if !ok {
+		var err error
 		cli, err = raven.New(dsn)
 		if err != nil {
 			return err
@@ -60,7 +58,7 @@ func sendReport(dsn, path string, report []byte) error {
 	return <-errC
 }

-func parseReport(path string, report []byte) (*raven.Packet, error) {
+func parseCrashReport(path string, report []byte) (*raven.Packet, error) {
 	parts := bytes.SplitN(report, []byte("\n"), 2)
 	if len(parts) != 2 {
 		return nil, errors.New("no first line")
@@ -109,7 +107,7 @@ func parseReport(path string, report []byte) (*raven.Packet, error) {
 		loader.LockWithVersion(version.tag)
 	} else {
 		// Last resort
-		loader.LockWithVersion("master")
+		loader.LockWithVersion("main")
 	}
 	defer loader.Unlock()

@@ -124,44 +122,68 @@ func parseReport(path string, report []byte) (*raven.Packet, error) {
 		}
 	}

-	pkt := &raven.Packet{
-		Message:     string(subjectLine),
-		Platform:    "go",
-		Release:     version.tag,
-		Environment: version.environment(),
-		Tags: raven.Tags{
-			raven.Tag{Key: "version", Value: version.version},
-			raven.Tag{Key: "tag", Value: version.tag},
-			raven.Tag{Key: "codename", Value: version.codename},
-			raven.Tag{Key: "runtime", Value: version.runtime},
-			raven.Tag{Key: "goos", Value: version.goos},
-			raven.Tag{Key: "goarch", Value: version.goarch},
-			raven.Tag{Key: "builder", Value: version.builder},
-		},
-		Extra: raven.Extra{
-			"url": reportServer + path,
-		},
-		Interfaces: []raven.Interface{&trace},
-	}
-	if version.commit != "" {
-		pkt.Tags = append(pkt.Tags, raven.Tag{Key: "commit", Value: version.commit})
+	pkt := packet(version, "crash")
+	pkt.Message = string(subjectLine)
+	pkt.Extra = raven.Extra{
+		"url": reportServer + path,
 	}
+	pkt.Interfaces = []raven.Interface{&trace}
+	pkt.Fingerprint = crashReportFingerprint(pkt.Message)

 	return pkt, nil
 }

-// syncthing v1.1.4-rc.1+30-g6aaae618-dirty-crashrep "Erbium Earthworm" (go1.12.5 darwin-amd64) jb@kvin.kastelo.net 2019-05-23 16:08:14 UTC
-var longVersionRE = regexp.MustCompile(`syncthing\s+(v[^\s]+)\s+"([^"]+)"\s\(([^\s]+)\s+([^-]+)-([^)]+)\)\s+([^\s]+)`)
+var (
+	indexRe          = regexp.MustCompile(`\[[-:0-9]+\]`)
+	sizeRe           = regexp.MustCompile(`(length|capacity) [0-9]+`)
+	ldbPosRe         = regexp.MustCompile(`(\(pos=)([0-9]+)\)`)
+	ldbChecksumRe    = regexp.MustCompile(`(want=0x)([a-z0-9]+)( got=0x)([a-z0-9]+)`)
+	ldbFileRe        = regexp.MustCompile(`(\[file=)([0-9]+)(\.ldb\])`)
+	ldbInternalKeyRe = regexp.MustCompile(`(internal key ")[^"]+(", len=)[0-9]+`)
+	ldbPathRe        = regexp.MustCompile(`(open|write|read) .+[\\/].+[\\/]index[^\\/]+[\\/][^\\/]+: `)
+)
+
+func sanitizeMessageLDB(message string) string {
+	message = ldbPosRe.ReplaceAllString(message, "${1}x)")
+	message = ldbFileRe.ReplaceAllString(message, "${1}x${3}")
+	message = ldbChecksumRe.ReplaceAllString(message, "${1}X${3}X")
+	message = ldbInternalKeyRe.ReplaceAllString(message, "${1}x${2}x")
+	message = ldbPathRe.ReplaceAllString(message, "$1 x: ")
+	return message
+}
+
+func crashReportFingerprint(message string) []string {
+	// Do not fingerprint on the stack in case of db corruption or fatal
+	// db io error - where it occurs doesn't matter.
+	orig := message
+	message = sanitizeMessageLDB(message)
+	if message != orig {
+		return []string{message}
+	}
+
+	message = indexRe.ReplaceAllString(message, "[x]")
+	message = sizeRe.ReplaceAllString(message, "$1 x")
+
+	// {{ default }} is what sentry uses as a fingerprint by default. While
+	// never specified, the docs point at this being some hash derived from the
+	// stack trace. Here we include the filtered panic message on top of that.
+	// https://docs.sentry.io/platforms/go/data-management/event-grouping/sdk-fingerprinting/#basic-example
+	return []string{"{{ default }}", message}
+}
+
+// syncthing v1.1.4-rc.1+30-g6aaae618-dirty-crashrep "Erbium Earthworm" (go1.12.5 darwin-amd64) jb@kvin.kastelo.net 2019-05-23 16:08:14 UTC [foo, bar]
+var longVersionRE = regexp.MustCompile(`syncthing\s+(v[^\s]+)\s+"([^"]+)"\s\(([^\s]+)\s+([^-]+)-([^)]+)\)\s+([^\s]+)[^\[]*(?:\[(.+)\])?$`)

 type version struct {
-	version  string // "v1.1.4-rc.1+30-g6aaae618-dirty-crashrep"
-	tag      string // "v1.1.4-rc.1"
-	commit   string // "6aaae618", blank when absent
-	codename string // "Erbium Earthworm"
-	runtime  string // "go1.12.5"
-	goos     string // "darwin"
-	goarch   string // "amd64"
-	builder  string // "jb@kvin.kastelo.net"
+	version  string   // "v1.1.4-rc.1+30-g6aaae618-dirty-crashrep"
+	tag      string   // "v1.1.4-rc.1"
+	commit   string   // "6aaae618", blank when absent
+	codename string   // "Erbium Earthworm"
+	runtime  string   // "go1.12.5"
+	goos     string   // "darwin"
+	goarch   string   // "amd64"
+	builder  string   // "jb@kvin.kastelo.net"
+	extra    []string // "foo", "bar"
 }

 func (v version) environment() string {
@@ -191,6 +213,7 @@ func parseVersion(line string) (version, error) {
 		goarch:   m[5],
 		builder:  m[6],
 	}
+
 	parts := strings.Split(v.version, "+")
 	v.tag = parts[0]
 	if len(parts) > 1 {
@@ -200,5 +223,38 @@ func parseVersion(line string) (version, error) {
 		}
 	}

+	if len(m) >= 8 && m[7] != "" {
+		tags := strings.Split(m[7], ",")
+		for i := range tags {
+			tags[i] = strings.TrimSpace(tags[i])
+		}
+		v.extra = tags
+	}
+
 	return v, nil
 }
+
+func packet(version version, reportType string) *raven.Packet {
+	pkt := &raven.Packet{
+		Platform:    "go",
+		Release:     version.tag,
+		Environment: version.environment(),
+		Tags: raven.Tags{
+			raven.Tag{Key: "version", Value: version.version},
+			raven.Tag{Key: "tag", Value: version.tag},
+			raven.Tag{Key: "codename", Value: version.codename},
+			raven.Tag{Key: "runtime", Value: version.runtime},
+			raven.Tag{Key: "goos", Value: version.goos},
+			raven.Tag{Key: "goarch", Value: version.goarch},
+			raven.Tag{Key: "builder", Value: version.builder},
+			raven.Tag{Key: "report_type", Value: reportType},
+		},
+	}
+	if version.commit != "" {
+		pkt.Tags = append(pkt.Tags, raven.Tag{Key: "commit", Value: version.commit})
+	}
+	for _, tag := range version.extra {
+		pkt.Tags = append(pkt.Tags, raven.Tag{Key: tag, Value: "1"})
+	}
+	return pkt
+}
--- a/cmd/stcrashreceiver/sentry_test.go
+++ b/cmd/stcrashreceiver/sentry_test.go
@@ -30,16 +30,30 @@ func TestParseVersion(t *testing.T) {
 				builder:  "jb@kvin.kastelo.net",
 			},
 		},
+		{
+			longVersion: `syncthing v1.1.4-rc.1+30-g6aaae618-dirty-crashrep "Erbium Earthworm" (go1.12.5 darwin-amd64) jb@kvin.kastelo.net 2019-05-23 16:08:14 UTC [foo, bar]`,
+			parsed: version{
+				version:  "v1.1.4-rc.1+30-g6aaae618-dirty-crashrep",
+				tag:      "v1.1.4-rc.1",
+				commit:   "6aaae618",
+				codename: "Erbium Earthworm",
+				runtime:  "go1.12.5",
+				goos:     "darwin",
+				goarch:   "amd64",
+				builder:  "jb@kvin.kastelo.net",
+				extra:    []string{"foo", "bar"},
+			},
+		},
 	}

 	for _, tc := range cases {
 		v, err := parseVersion(tc.longVersion)
 		if err != nil {
-			t.Error(err)
+			t.Errorf("%s\nerror: %v\n", tc.longVersion, err)
 			continue
 		}
-		if v != tc.parsed {
-			t.Error(v)
+		if fmt.Sprint(v) != fmt.Sprint(tc.parsed) {
+			t.Errorf("%s\nA: %v\nE: %v\n", tc.longVersion, v, tc.parsed)
 		}
 	}
 }
@@ -50,7 +64,7 @@ func TestParseReport(t *testing.T) {
 		t.Fatal(err)
 	}

-	pkt, err := parseReport("1/2/345", bs)
+	pkt, err := parseCrashReport("1/2/345", bs)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -62,3 +76,66 @@ func TestParseReport(t *testing.T) {

 	fmt.Printf("%s\n", bs)
 }
+
+func TestCrashReportFingerprint(t *testing.T) {
+	cases := []struct {
+		message, exp string
+		ldb          bool
+	}{
+		{
+			message: "panic: leveldb/table: corruption on data-block (pos=51308946): checksum mismatch, want=0xa89f9aa0 got=0xd27cc4c7 [file=004003.ldb]",
+			exp:     "panic: leveldb/table: corruption on data-block (pos=x): checksum mismatch, want=0xX got=0xX [file=x.ldb]",
+			ldb:     true,
+		},
+		{
+			message: "panic: leveldb/table: corruption on table-footer (pos=248): bad magic number [file=001370.ldb]",
+			exp:     "panic: leveldb/table: corruption on table-footer (pos=x): bad magic number [file=x.ldb]",
+			ldb:     true,
+		},
+		{
+			message: "panic: runtime error: slice bounds out of range [4294967283:4194304]",
+			exp:     "panic: runtime error: slice bounds out of range [x]",
+		},
+		{
+			message: "panic: runtime error: slice bounds out of range [-2:]",
+			exp:     "panic: runtime error: slice bounds out of range [x]",
+		},
+		{
+			message: "panic: runtime error: slice bounds out of range [:4294967283] with capacity 32768",
+			exp:     "panic: runtime error: slice bounds out of range [x] with capacity x",
+		},
+		{
+			message: "panic: runtime error: index out of range [0] with length 0",
+			exp:     "panic: runtime error: index out of range [x] with length x",
+		},
+		{
+			message: `panic: leveldb: internal key "\x01", len=1: invalid length`,
+			exp:     `panic: leveldb: internal key "x", len=x: invalid length`,
+			ldb:     true,
+		},
+		{
+			message: `panic: write /var/syncthing/config/index-v0.14.0.db/2732813.log: cannot allocate memory`,
+			exp:     `panic: write x: cannot allocate memory`,
+			ldb:     true,
+		},
+		{
+			message: `panic: filling Blocks: read C:\Users\Serv-Resp-Tizayuca\AppData\Local\Syncthing\index-v0.14.0.db\006561.ldb: Error de datos (comprobación de redundancia cíclica).`,
+			exp:     `panic: filling Blocks: read x: Error de datos (comprobación de redundancia cíclica).`,
+			ldb:     true,
+		},
+	}
+
+	for i, tc := range cases {
+		fingerprint := crashReportFingerprint(tc.message)
+
+		expLen := 2
+		if tc.ldb {
+			expLen = 1
+		}
+		if l := len(fingerprint); l != expLen {
+			t.Errorf("tc %v: Unexpected fingerprint length: %v != %v", i, l, expLen)
+		} else if msg := fingerprint[expLen-1]; msg != tc.exp {
+			t.Errorf("tc %v:\n\"%v\" !=\n\"%v\"", i, msg, tc.exp)
+		}
+	}
+}
--- a/cmd/stcrashreceiver/sourcecodeloader.go
+++ b/cmd/stcrashreceiver/sourcecodeloader.go
@@ -72,8 +72,12 @@ func (l *githubSourceCodeLoader) Load(filename string, line, context int) ([][]b
 		url := urlPrefix + l.version + filename[idx:]
 		resp, err := l.client.Get(url)

-		if err != nil || resp.StatusCode != http.StatusOK {
-			fmt.Println("Loading source:", err.Error())
+		if err != nil {
+			fmt.Println("Loading source:", err)
+			return nil, 0
+		}
+		if resp.StatusCode != http.StatusOK {
+			fmt.Println("Loading source:", resp.Status)
 			return nil, 0
 		}
 		data, err := ioutil.ReadAll(resp.Body)
--- a/cmd/stcrashreceiver/stcrashreceiver.go
+++ b/cmd/stcrashreceiver/stcrashreceiver.go
@@ -4,18 +4,11 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-// Command stcrashreceiver is a trivial HTTP server that allows two things:
-//
-// - uploading files (crash reports) named like a SHA256 hash using a PUT request
-// - checking whether such file exists using a HEAD request
-//
-// Typically this should be deployed behind something that manages HTTPS.
 package main

 import (
 	"bytes"
 	"compress/gzip"
-	"flag"
 	"io"
 	"io/ioutil"
 	"log"
@@ -26,25 +19,6 @@ import (
 	"strings"
 )

-const maxRequestSize = 1 << 20 // 1 MiB
-
-func main() {
-	dir := flag.String("dir", ".", "Directory to store reports in")
-	dsn := flag.String("dsn", "", "Sentry DSN")
-	listen := flag.String("listen", ":22039", "HTTP listen address")
-	flag.Parse()
-
-	cr := &crashReceiver{
-		dir: *dir,
-		dsn: *dsn,
-	}
-
-	log.SetOutput(os.Stdout)
-	if err := http.ListenAndServe(*listen, cr); err != nil {
-		log.Fatalln("HTTP serve:", err)
-	}
-}
-
 type crashReceiver struct {
 	dir string
 	dsn string
@@ -145,10 +119,18 @@ func (r *crashReceiver) servePut(reportID, fullPath string, w http.ResponseWrite

 	// Send the report to Sentry
 	if r.dsn != "" {
+		// Remote ID
+		user := userIDFor(req)
+
 		go func() {
 			// There's no need for the client to have to wait for this part.
-			if err := sendReport(r.dsn, reportID, bs); err != nil {
-				log.Println("Failed to send report:", err)
+			pkt, err := parseCrashReport(reportID, bs)
+			if err != nil {
+				log.Println("Failed to parse crash report:", err)
+				return
+			}
+			if err := sendReport(r.dsn, pkt, user); err != nil {
+				log.Println("Failed to send crash report:", err)
 			}
 		}()
 	}
--- a/cmd/stcrashreceiver/util.go
+++ b/cmd/stcrashreceiver/util.go
@@ -0,0 +1,57 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"path/filepath"
+	"time"
+
+	"github.com/syncthing/syncthing/lib/sha256"
+)
+
+// userIDFor returns a string we can use as the user ID for the purpose of
+// counting affected users. It's the truncated hash of a salt, the user
+// remote IP, and the current month.
+func userIDFor(req *http.Request) string {
+	addr := req.RemoteAddr
+	if fwd := req.Header.Get("x-forwarded-for"); fwd != "" {
+		addr = fwd
+	}
+	if host, _, err := net.SplitHostPort(addr); err == nil {
+		addr = host
+	}
+	now := time.Now().Format("200601")
+	salt := "stcrashreporter"
+	hash := sha256.Sum256([]byte(salt + addr + now))
+	return fmt.Sprintf("%x", hash[:8])
+}
+
+// 01234567890abcdef... => 01/23
+func dirFor(base string) string {
+	return filepath.Join(base[0:2], base[2:4])
+}
+
+func fullPathCompressed(root, reportID string) string {
+	return filepath.Join(root, dirFor(reportID), reportID) + ".gz"
+}
+
+func compressAndWrite(bs []byte, fullPath string) error {
+	// Compress the report for storage
+	buf := new(bytes.Buffer)
+	gw := gzip.NewWriter(buf)
+	_, _ = gw.Write(bs) // can't fail
+	gw.Close()
+
+	// Create an output file with the compressed report
+	return ioutil.WriteFile(fullPath, buf.Bytes(), 0644)
+}
--- a/cmd/stdisco/main.go
+++ b/cmd/stdisco/main.go
@@ -7,6 +7,7 @@
 package main

 import (
+	"context"
 	"crypto/rand"
 	"encoding/binary"
 	"flag"
@@ -47,14 +48,16 @@ func main() {
 		log.Println("My ID:", myID)
 	}

-	runbeacon(beacon.NewMulticast(mc), fake)
-	runbeacon(beacon.NewBroadcast(bc), fake)
+	ctx := context.Background()
+
+	runbeacon(ctx, beacon.NewMulticast(mc), fake)
+	runbeacon(ctx, beacon.NewBroadcast(bc), fake)

 	select {}
 }

-func runbeacon(bc beacon.Interface, fake bool) {
-	go bc.Serve()
+func runbeacon(ctx context.Context, bc beacon.Interface, fake bool) {
+	go bc.Serve(ctx)
 	go recv(bc)
 	if fake {
 		go send(bc)
--- a/cmd/stdiscosrv/apisrv.go
+++ b/cmd/stdiscosrv/apisrv.go
@@ -66,12 +66,12 @@ func newAPISrv(addr string, cert tls.Certificate, db database, repl replicator,
 	}
 }

-func (s *apiSrv) Serve() {
+func (s *apiSrv) Serve(ctx context.Context) error {
 	if s.useHTTP {
 		listener, err := net.Listen("tcp", s.addr)
 		if err != nil {
 			log.Println("Listen:", err)
-			return
+			return err
 		}
 		s.listener = listener
 	} else {
@@ -93,7 +93,7 @@ func (s *apiSrv) Serve() {
 		tlsListener, err := tls.Listen("tcp", s.addr, tlsCfg)
 		if err != nil {
 			log.Println("Listen:", err)
-			return
+			return err
 		}
 		s.listener = tlsListener
 	}
@@ -107,9 +107,11 @@ func (s *apiSrv) Serve() {
 		MaxHeaderBytes: httpMaxHeaderBytes,
 	}

-	if err := srv.Serve(s.listener); err != nil {
+	err := srv.Serve(s.listener)
+	if err != nil {
 		log.Println("Serve:", err)
 	}
+	return err
 }

 var topCtx = context.Background()
@@ -132,11 +134,19 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 		log.Println(reqID, req.Method, req.URL)
 	}

-	var remoteIP net.IP
+	remoteAddr := &net.TCPAddr{
+		IP:   nil,
+		Port: -1,
+	}
+
 	if s.useHTTP {
-		remoteIP = net.ParseIP(req.Header.Get("X-Forwarded-For"))
+		remoteAddr.IP = net.ParseIP(req.Header.Get("X-Forwarded-For"))
+		if parsedPort, err := strconv.ParseInt(req.Header.Get("X-Client-Port"), 10, 0); err == nil {
+			remoteAddr.Port = int(parsedPort)
+		}
 	} else {
-		addr, err := net.ResolveTCPAddr("tcp", req.RemoteAddr)
+		var err error
+		remoteAddr, err = net.ResolveTCPAddr("tcp", req.RemoteAddr)
 		if err != nil {
 			log.Println("remoteAddr:", err)
 			lw.Header().Set("Retry-After", errorRetryAfterString())
@@ -144,14 +154,13 @@ func (s *apiSrv) handler(w http.ResponseWriter, req *http.Request) {
 			apiRequestsTotal.WithLabelValues("no_remote_addr").Inc()
 			return
 		}
-		remoteIP = addr.IP
 	}

 	switch req.Method {
 	case "GET":
 		s.handleGET(ctx, lw, req)
 	case "POST":
-		s.handlePOST(ctx, remoteIP, lw, req)
+		s.handlePOST(ctx, remoteAddr, lw, req)
 	default:
 		http.Error(lw, "Method Not Allowed", http.StatusMethodNotAllowed)
 	}
@@ -217,7 +226,7 @@ func (s *apiSrv) handleGET(ctx context.Context, w http.ResponseWriter, req *http
 	w.Write(bs)
 }

-func (s *apiSrv) handlePOST(ctx context.Context, remoteIP net.IP, w http.ResponseWriter, req *http.Request) {
+func (s *apiSrv) handlePOST(ctx context.Context, remoteAddr *net.TCPAddr, w http.ResponseWriter, req *http.Request) {
 	reqID := ctx.Value(idKey).(requestID)

 	rawCert := certificateBytes(req)
@@ -244,7 +253,7 @@ func (s *apiSrv) handlePOST(ctx context.Context, remoteIP net.IP, w http.Respons

 	deviceID := protocol.NewDeviceID(rawCert)

-	addresses := fixupAddresses(remoteIP, ann.Addresses)
+	addresses := fixupAddresses(remoteAddr, ann.Addresses)
 	if len(addresses) == 0 {
 		announceRequestsTotal.WithLabelValues("bad_request").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
@@ -252,7 +261,7 @@ func (s *apiSrv) handlePOST(ctx context.Context, remoteIP net.IP, w http.Respons
 		return
 	}

-	if err := s.handleAnnounce(remoteIP, deviceID, addresses); err != nil {
+	if err := s.handleAnnounce(deviceID, addresses); err != nil {
 		announceRequestsTotal.WithLabelValues("internal_error").Inc()
 		w.Header().Set("Retry-After", errorRetryAfterString())
 		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
@@ -269,7 +278,7 @@ func (s *apiSrv) Stop() {
 	s.listener.Close()
 }

-func (s *apiSrv) handleAnnounce(remote net.IP, deviceID protocol.DeviceID, addresses []string) error {
+func (s *apiSrv) handleAnnounce(deviceID protocol.DeviceID, addresses []string) error {
 	key := deviceID.String()
 	now := time.Now()
 	expire := now.Add(addressExpiryTime).UnixNano()
@@ -364,7 +373,7 @@ func certificateBytes(req *http.Request) []byte {

 // fixupAddresses checks the list of addresses, removing invalid ones and
 // replacing unspecified IPs with the given remote IP.
-func fixupAddresses(remote net.IP, addresses []string) []string {
+func fixupAddresses(remote *net.TCPAddr, addresses []string) []string {
 	fixed := make([]string, 0, len(addresses))
 	for _, annAddr := range addresses {
 		uri, err := url.Parse(annAddr)
@@ -384,27 +393,34 @@ func fixupAddresses(remote net.IP, addresses []string) []string {
 			continue
 		}

-		if host == "" || ip.IsUnspecified() {
-			// Replace the unspecified IP with the request source.
+		if remote != nil {
+			if host == "" || ip.IsUnspecified() {
+				// Replace the unspecified IP with the request source.

-			// ... unless the request source is the loopback address or
-			// multicast/unspecified (can't happen, really).
-			if remote.IsLoopback() || remote.IsMulticast() || remote.IsUnspecified() {
-				continue
+				// ... unless the request source is the loopback address or
+				// multicast/unspecified (can't happen, really).
+				if remote.IP.IsLoopback() || remote.IP.IsMulticast() || remote.IP.IsUnspecified() {
+					continue
+				}
+
+				// Do not use IPv6 remote address if requested scheme is ...4
+				// (i.e., tcp4, etc.)
+				if strings.HasSuffix(uri.Scheme, "4") && remote.IP.To4() == nil {
+					continue
+				}
+
+				// Do not use IPv4 remote address if requested scheme is ...6
+				if strings.HasSuffix(uri.Scheme, "6") && remote.IP.To4() != nil {
+					continue
+				}
+
+				host = remote.IP.String()
 			}

-			// Do not use IPv6 remote address if requested scheme is ...4
-			// (i.e., tcp4, etc.)
-			if strings.HasSuffix(uri.Scheme, "4") && remote.To4() == nil {
-				continue
+			// If zero port was specified, use remote port.
+			if port == "0" && remote.Port > 0 {
+				port = fmt.Sprintf("%d", remote.Port)
 			}
-
-			// Do not use IPv4 remote address if requested scheme is ...6
-			if strings.HasSuffix(uri.Scheme, "6") && remote.To4() != nil {
-				continue
-			}
-
-			host = remote.String()
 		}

 		uri.Host = net.JoinHostPort(host, port)
--- a/cmd/stdiscosrv/apisrv_test.go
+++ b/cmd/stdiscosrv/apisrv_test.go
@@ -14,7 +14,7 @@ import (

 func TestFixupAddresses(t *testing.T) {
 	cases := []struct {
-		remote net.IP
+		remote *net.TCPAddr
 		in     []string
 		out    []string
 	}{
@@ -22,37 +22,53 @@ func TestFixupAddresses(t *testing.T) {
 			in:  []string{"tcp://1.2.3.4:22000"},
 			out: []string{"tcp://1.2.3.4:22000"},
 		}, { // unspecified replaced by remote
-			remote: net.ParseIP("1.2.3.4"),
+			remote: addr("1.2.3.4", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://1.2.3.4:22000", "tcp://192.0.2.42:22000"},
 		}, { // unspecified not used as replacement
-			remote: net.ParseIP("0.0.0.0"),
+			remote: addr("0.0.0.0", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // unspecified not used as replacement
-			remote: net.ParseIP("::"),
+			remote: addr("::", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // localhost not used as replacement
-			remote: net.ParseIP("127.0.0.1"),
+			remote: addr("127.0.0.1", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // localhost not used as replacement
-			remote: net.ParseIP("::1"),
+			remote: addr("::1", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // multicast not used as replacement
-			remote: net.ParseIP("224.0.0.1"),
+			remote: addr("224.0.0.1", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // multicast not used as replacement
-			remote: net.ParseIP("ff80::42"),
+			remote: addr("ff80::42", 22000),
 			in:     []string{"tcp://:22000", "tcp://192.0.2.42:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
 		}, { // explicitly announced weirdness is also filtered
-			remote: net.ParseIP("192.0.2.42"),
+			remote: addr("192.0.2.42", 22000),
 			in:     []string{"tcp://:22000", "tcp://127.1.2.3:22000", "tcp://[::1]:22000", "tcp://[ff80::42]:22000"},
 			out:    []string{"tcp://192.0.2.42:22000"},
+		}, { // port remapping
+			remote: addr("123.123.123.123", 9000),
+			in:     []string{"tcp://0.0.0.0:0"},
+			out:    []string{"tcp://123.123.123.123:9000"},
+		}, { // unspecified port remapping
+			remote: addr("123.123.123.123", 9000),
+			in:     []string{"tcp://:0"},
+			out:    []string{"tcp://123.123.123.123:9000"},
+		}, { // empty remapping
+			remote: addr("123.123.123.123", 9000),
+			in:     []string{"tcp://"},
+			out:    []string{},
+		}, { // port only remapping
+			remote: addr("123.123.123.123", 9000),
+			in:     []string{"tcp://44.44.44.44:0"},
+			out:    []string{"tcp://44.44.44.44:9000"},
 		},
 	}

@@ -63,3 +79,10 @@ func TestFixupAddresses(t *testing.T) {
 		}
 	}
 }
+
+func addr(host string, port int) *net.TCPAddr {
+	return &net.TCPAddr{
+		IP:   net.ParseIP(host),
+		Port: port,
+	}
+}
--- a/cmd/stdiscosrv/database.go
+++ b/cmd/stdiscosrv/database.go
@@ -4,12 +4,13 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-//go:generate go run ../../script/protofmt.go database.proto
+//go:generate go run ../../proto/scripts/protofmt.go database.proto
 //go:generate protoc -I ../../ -I . --gogofast_out=. database.proto

 package main

 import (
+	"context"
 	"log"
 	"sort"
 	"time"
@@ -37,7 +38,6 @@ type database interface {
 type levelDBStore struct {
 	db         *leveldb.DB
 	inbox      chan func()
-	stop       chan struct{}
 	clock      clock
 	marshalBuf []byte
 }
@@ -50,7 +50,6 @@ func newLevelDBStore(dir string) (*levelDBStore, error) {
 	return &levelDBStore{
 		db:    db,
 		inbox: make(chan func(), 16),
-		stop:  make(chan struct{}),
 		clock: defaultClock{},
 	}, nil
 }
@@ -155,7 +154,7 @@ func (s *levelDBStore) get(key string) (DatabaseRecord, error) {
 	return rec, nil
 }

-func (s *levelDBStore) Serve() {
+func (s *levelDBStore) Serve(ctx context.Context) error {
 	t := time.NewTimer(0)
 	defer t.Stop()
 	defer s.db.Close()
@@ -183,7 +182,7 @@ loop:
 			// the next.
 			t.Reset(databaseStatisticsInterval)

-		case <-s.stop:
+		case <-ctx.Done():
 			// We're done.
 			close(statisticsTrigger)
 			break loop
@@ -192,6 +191,8 @@ loop:

 	// Also wait for statisticsServe to return
 	<-statisticsDone
+
+	return nil
 }

 func (s *levelDBStore) statisticsServe(trigger <-chan struct{}, done chan<- struct{}) {
@@ -255,10 +256,6 @@ func (s *levelDBStore) statisticsServe(trigger <-chan struct{}, done chan<- stru
 	}
 }

-func (s *levelDBStore) Stop() {
-	close(s.stop)
-}
-
 // merge returns the merged result of the two database records a and b. The
 // result is the union of the two address sets, with the newer expiry time
 // chosen for any duplicates.
--- a/cmd/stdiscosrv/database.pb.go
+++ b/cmd/stdiscosrv/database.pb.go
@@ -510,10 +510,7 @@ func (m *DatabaseRecord) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {
@@ -648,10 +645,7 @@ func (m *ReplicationRecord) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {
@@ -752,10 +746,7 @@ func (m *DatabaseAddress) Unmarshal(dAtA []byte) error {
 			if err != nil {
 				return err
 			}
-			if skippy < 0 {
-				return ErrInvalidLengthDatabase
-			}
-			if (iNdEx + skippy) < 0 {
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
 				return ErrInvalidLengthDatabase
 			}
 			if (iNdEx + skippy) > l {
--- a/cmd/stdiscosrv/database_test.go
+++ b/cmd/stdiscosrv/database_test.go
@@ -7,6 +7,7 @@
 package main

 import (
+	"context"
 	"fmt"
 	"os"
 	"testing"
@@ -20,8 +21,9 @@ func TestDatabaseGetSet(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	go db.Serve()
-	defer db.Stop()
+	ctx, cancel := context.WithCancel(context.Background())
+	go db.Serve(ctx)
+	defer cancel()

 	// Check missing record

--- a/cmd/stdiscosrv/main.go
+++ b/cmd/stdiscosrv/main.go
@@ -7,6 +7,7 @@
 package main

 import (
+	"context"
 	"crypto/tls"
 	"flag"
 	"log"
@@ -21,7 +22,7 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/tlsutil"
 	"github.com/syndtr/goleveldb/leveldb/opt"
-	"github.com/thejerf/suture"
+	"github.com/thejerf/suture/v4"
 )

 const (
@@ -92,20 +93,21 @@ func main() {
 	showVersion := flag.Bool("version", false, "Show version")
 	flag.Parse()

-	log.Println(build.LongVersion)
+	log.Println(build.LongVersionFor("stdiscosrv"))
 	if *showVersion {
 		return
 	}

 	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
-	if err != nil {
+	if os.IsNotExist(err) {
 		log.Println("Failed to load keypair. Generating one, this might take a while...")
 		cert, err = tlsutil.NewCertificate(certFile, keyFile, "stdiscosrv", 20*365)
 		if err != nil {
 			log.Fatalln("Failed to generate X509 key pair:", err)
 		}
+	} else if err != nil {
+		log.Fatalln("Failed to load keypair:", err)
 	}
-
 	devID := protocol.NewDeviceID(cert.Certificate[0])
 	log.Println("Server device ID is", devID)

@@ -182,5 +184,5 @@ func main() {
 	}

 	// Engage!
-	main.Serve()
+	main.Serve(context.Background())
 }
--- a/cmd/stdiscosrv/replication.go
+++ b/cmd/stdiscosrv/replication.go
@@ -7,6 +7,7 @@
 package main

 import (
+	"context"
 	"crypto/tls"
 	"encoding/binary"
 	"fmt"
@@ -32,7 +33,6 @@ type replicationSender struct {
 	cert       tls.Certificate // our certificate
 	allowedIDs []protocol.DeviceID
 	outbox     chan ReplicationRecord
-	stop       chan struct{}
 }

 func newReplicationSender(dst string, cert tls.Certificate, allowedIDs []protocol.DeviceID) *replicationSender {
@@ -41,11 +41,10 @@ func newReplicationSender(dst string, cert tls.Certificate, allowedIDs []protoco
 		cert:       cert,
 		allowedIDs: allowedIDs,
 		outbox:     make(chan ReplicationRecord, replicationOutboxSize),
-		stop:       make(chan struct{}),
 	}
 }

-func (s *replicationSender) Serve() {
+func (s *replicationSender) Serve(ctx context.Context) error {
 	// Sleep a little at startup. Peers often restart at the same time, and
 	// this avoid the service failing and entering backoff state
 	// unnecessarily, while also reducing the reconnect rate to something
@@ -62,7 +61,7 @@ func (s *replicationSender) Serve() {
 	conn, err := tls.Dial("tcp", s.dst, tlsCfg)
 	if err != nil {
 		log.Println("Replication connect:", err)
-		return
+		return err
 	}
 	defer func() {
 		conn.SetWriteDeadline(time.Now().Add(time.Second))
@@ -73,13 +72,13 @@ func (s *replicationSender) Serve() {
 	remoteID, err := deviceID(conn)
 	if err != nil {
 		log.Println("Replication connect:", err)
-		return
+		return err
 	}

 	// Verify it's in the set of allowed device IDs.
 	if !deviceIDIn(remoteID, s.allowedIDs) {
 		log.Println("Replication connect: unexpected device ID:", remoteID)
-		return
+		return err
 	}

 	heartBeatTicker := time.NewTicker(replicationHeartbeatInterval)
@@ -122,20 +121,16 @@ func (s *replicationSender) Serve() {
 				replicationSendsTotal.WithLabelValues("error").Inc()
 				log.Println("Replication write:", err)
 				// Yes, we are loosing the replication event here.
-				return
+				return err
 			}
 			replicationSendsTotal.WithLabelValues("success").Inc()

-		case <-s.stop:
-			return
+		case <-ctx.Done():
+			return nil
 		}
 	}
 }

-func (s *replicationSender) Stop() {
-	close(s.stop)
-}
-
 func (s *replicationSender) String() string {
 	return fmt.Sprintf("replicationSender(%q)", s.dst)
 }
@@ -172,7 +167,6 @@ type replicationListener struct {
 	cert       tls.Certificate
 	allowedIDs []protocol.DeviceID
 	db         database
-	stop       chan struct{}
 }

 func newReplicationListener(addr string, cert tls.Certificate, allowedIDs []protocol.DeviceID, db database) *replicationListener {
@@ -181,11 +175,10 @@ func newReplicationListener(addr string, cert tls.Certificate, allowedIDs []prot
 		cert:       cert,
 		allowedIDs: allowedIDs,
 		db:         db,
-		stop:       make(chan struct{}),
 	}
 }

-func (l *replicationListener) Serve() {
+func (l *replicationListener) Serve(ctx context.Context) error {
 	tlsCfg := &tls.Config{
 		Certificates:       []tls.Certificate{l.cert},
 		ClientAuth:         tls.RequestClientCert,
@@ -196,14 +189,14 @@ func (l *replicationListener) Serve() {
 	lst, err := tls.Listen("tcp", l.addr, tlsCfg)
 	if err != nil {
 		log.Println("Replication listen:", err)
-		return
+		return err
 	}
 	defer lst.Close()

 	for {
 		select {
-		case <-l.stop:
-			return
+		case <-ctx.Done():
+			return nil
 		default:
 		}

@@ -211,7 +204,7 @@ func (l *replicationListener) Serve() {
 		conn, err := lst.Accept()
 		if err != nil {
 			log.Println("Replication accept:", err)
-			return
+			return err
 		}

 		// Figure out the other side device ID
@@ -231,19 +224,15 @@ func (l *replicationListener) Serve() {
 			continue
 		}

-		go l.handle(conn)
+		go l.handle(ctx, conn)
 	}
 }

-func (l *replicationListener) Stop() {
-	close(l.stop)
-}
-
 func (l *replicationListener) String() string {
 	return fmt.Sprintf("replicationListener(%q)", l.addr)
 }

-func (l *replicationListener) handle(conn net.Conn) {
+func (l *replicationListener) handle(ctx context.Context, conn net.Conn) {
 	defer func() {
 		conn.SetWriteDeadline(time.Now().Add(time.Second))
 		conn.Close()
@@ -253,7 +242,7 @@ func (l *replicationListener) handle(conn net.Conn) {

 	for {
 		select {
-		case <-l.stop:
+		case <-ctx.Done():
 			return
 		default:
 		}
--- a/cmd/stevents/main.go
+++ b/cmd/stevents/main.go
@@ -28,16 +28,21 @@ func main() {
 	log.SetFlags(0)

 	target := flag.String("target", "localhost:8384", "Target Syncthing instance")
+	types := flag.String("types", "", "Filter for specific event types (comma-separated)")
 	apikey := flag.String("apikey", "", "Syncthing API key")
 	flag.Parse()

 	if *apikey == "" {
 		log.Fatal("Must give -apikey argument")
 	}
+	var eventsArg string
+	if len(*types) > 0 {
+		eventsArg = "&events=" + *types
+	}

 	since := 0
 	for {
-		req, err := http.NewRequest("GET", fmt.Sprintf("http://%s/rest/events?since=%d", *target, since), nil)
+		req, err := http.NewRequest("GET", fmt.Sprintf("http://%s/rest/events?since=%d%s", *target, since, eventsArg), nil)
 		if err != nil {
 			log.Fatal(err)
 		}
--- a/cmd/stindex/dump.go
+++ b/cmd/stindex/dump.go
@@ -1,112 +0,0 @@
-// Copyright (C) 2015 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"encoding/binary"
-	"fmt"
-	"log"
-	"time"
-
-	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
-	"github.com/syncthing/syncthing/lib/protocol"
-)
-
-func dump(ldb backend.Backend) {
-	it, err := ldb.NewPrefixIterator(nil)
-	if err != nil {
-		log.Fatal(err)
-	}
-	for it.Next() {
-		key := it.Key()
-		switch key[0] {
-		case db.KeyTypeDevice:
-			folder := binary.BigEndian.Uint32(key[1:])
-			device := binary.BigEndian.Uint32(key[1+4:])
-			name := nulString(key[1+4+4:])
-			fmt.Printf("[device] F:%d D:%d N:%q", folder, device, name)
-
-			var f protocol.FileInfo
-			err := f.Unmarshal(it.Value())
-			if err != nil {
-				log.Fatal(err)
-			}
-			fmt.Printf(" V:%v\n", f)
-
-		case db.KeyTypeGlobal:
-			folder := binary.BigEndian.Uint32(key[1:])
-			name := nulString(key[1+4:])
-			var flv db.VersionList
-			flv.Unmarshal(it.Value())
-			fmt.Printf("[global] F:%d N:%q V:%s\n", folder, name, flv)
-
-		case db.KeyTypeBlock:
-			folder := binary.BigEndian.Uint32(key[1:])
-			hash := key[1+4 : 1+4+32]
-			name := nulString(key[1+4+32:])
-			fmt.Printf("[block] F:%d H:%x N:%q I:%d\n", folder, hash, name, binary.BigEndian.Uint32(it.Value()))
-
-		case db.KeyTypeDeviceStatistic:
-			fmt.Printf("[dstat] K:%x V:%x\n", it.Key(), it.Value())
-
-		case db.KeyTypeFolderStatistic:
-			fmt.Printf("[fstat] K:%x V:%x\n", it.Key(), it.Value())
-
-		case db.KeyTypeVirtualMtime:
-			folder := binary.BigEndian.Uint32(key[1:])
-			name := nulString(key[1+4:])
-			val := it.Value()
-			var real, virt time.Time
-			real.UnmarshalBinary(val[:len(val)/2])
-			virt.UnmarshalBinary(val[len(val)/2:])
-			fmt.Printf("[mtime] F:%d N:%q R:%v V:%v\n", folder, name, real, virt)
-
-		case db.KeyTypeFolderIdx:
-			key := binary.BigEndian.Uint32(it.Key()[1:])
-			fmt.Printf("[folderidx] K:%d V:%q\n", key, it.Value())
-
-		case db.KeyTypeDeviceIdx:
-			key := binary.BigEndian.Uint32(it.Key()[1:])
-			val := it.Value()
-			if len(val) == 0 {
-				fmt.Printf("[deviceidx] K:%d V:<nil>\n", key)
-			} else {
-				dev := protocol.DeviceIDFromBytes(val)
-				fmt.Printf("[deviceidx] K:%d V:%s\n", key, dev)
-			}
-
-		case db.KeyTypeIndexID:
-			device := binary.BigEndian.Uint32(it.Key()[1:])
-			folder := binary.BigEndian.Uint32(it.Key()[5:])
-			fmt.Printf("[indexid] D:%d F:%d I:%x\n", device, folder, it.Value())
-
-		case db.KeyTypeFolderMeta:
-			folder := binary.BigEndian.Uint32(it.Key()[1:])
-			fmt.Printf("[foldermeta] F:%d V:%x\n", folder, it.Value())
-
-		case db.KeyTypeMiscData:
-			fmt.Printf("[miscdata] K:%q V:%q\n", it.Key()[1:], it.Value())
-
-		case db.KeyTypeSequence:
-			folder := binary.BigEndian.Uint32(it.Key()[1:])
-			seq := binary.BigEndian.Uint64(it.Key()[5:])
-			fmt.Printf("[sequence] F:%d S:%d V:%q\n", folder, seq, it.Value())
-
-		case db.KeyTypeNeed:
-			folder := binary.BigEndian.Uint32(it.Key()[1:])
-			file := string(it.Key()[5:])
-			fmt.Printf("[need] F:%d V:%q\n", folder, file)
-
-		case db.KeyTypeBlockList:
-			fmt.Printf("[blocklist] H:%x\n", it.Key()[1:])
-
-		default:
-			fmt.Printf("[???]\n  %x\n  %x\n", it.Key(), it.Value())
-		}
-	}
-}
--- a/cmd/stindex/main.go
+++ b/cmd/stindex/main.go
@@ -1,52 +0,0 @@
-// Copyright (C) 2014 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"flag"
-	"fmt"
-	"log"
-	"os"
-	"path/filepath"
-
-	"github.com/syncthing/syncthing/lib/db/backend"
-)
-
-func main() {
-	var mode string
-	log.SetFlags(0)
-	log.SetOutput(os.Stdout)
-
-	flag.StringVar(&mode, "mode", "dump", "Mode of operation: dump, dumpsize, idxck")
-
-	flag.Parse()
-
-	path := flag.Arg(0)
-	if path == "" {
-		path = filepath.Join(defaultConfigDir(), "index-v0.14.0.db")
-	}
-
-	ldb, err := backend.OpenLevelDBRO(path)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	switch mode {
-	case "dump":
-		dump(ldb)
-	case "dumpsize":
-		dumpsize(ldb)
-	case "idxck":
-		if !idxck(ldb) {
-			os.Exit(1)
-		}
-	case "account":
-		account(ldb)
-	default:
-		fmt.Println("Unknown mode")
-	}
-}
--- a/cmd/stindex/util.go
+++ b/cmd/stindex/util.go
@@ -1,52 +0,0 @@
-// Copyright (C) 2015 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"log"
-	"os"
-	"path/filepath"
-	"runtime"
-
-	"github.com/syncthing/syncthing/lib/fs"
-)
-
-func nulString(bs []byte) string {
-	for i := range bs {
-		if bs[i] == 0 {
-			return string(bs[:i])
-		}
-	}
-	return string(bs)
-}
-
-func defaultConfigDir() string {
-	switch runtime.GOOS {
-	case "windows":
-		if p := os.Getenv("LocalAppData"); p != "" {
-			return filepath.Join(p, "Syncthing")
-		}
-		return filepath.Join(os.Getenv("AppData"), "Syncthing")
-
-	case "darwin":
-		dir, err := fs.ExpandTilde("~/Library/Application Support/Syncthing")
-		if err != nil {
-			log.Fatal(err)
-		}
-		return dir
-
-	default:
-		if xdgCfg := os.Getenv("XDG_CONFIG_HOME"); xdgCfg != "" {
-			return filepath.Join(xdgCfg, "syncthing")
-		}
-		dir, err := fs.ExpandTilde("~/.config/syncthing")
-		if err != nil {
-			log.Fatal(err)
-		}
-		return dir
-	}
-}
--- a/cmd/strelaypoolsrv/auto/noassets.go
+++ b/cmd/strelaypoolsrv/auto/noassets.go
@@ -0,0 +1,16 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+//go:build noassets
+// +build noassets
+
+package auto
+
+import "github.com/syncthing/syncthing/lib/assets"
+
+func Assets() map[string]assets.Asset {
+	return nil
+}
--- a/cmd/strelaypoolsrv/gui/index.html
+++ b/cmd/strelaypoolsrv/gui/index.html
@@ -9,8 +9,15 @@
    <meta name="author" content=""/>

    <title>Relay stats</title>
-    <link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>
-    <link rel="stylesheet" href="//use.fontawesome.com/releases/v5.0.13/css/all.css"/>
+    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css"/>
+    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>
+    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css"/>
+    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.6.0/dist/leaflet.css"
+  integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
+  crossorigin=""/>
+  <script src="https://unpkg.com/leaflet@1.6.0/dist/leaflet.js"
+  integrity="sha512-gZwIG9x3wUXg2hdXF6+rVkLF/0Vi9U8D2Ntg4Ga5I5BZpVkVxlJWbSQtXPSiUTtC0TjtGOmxa1AJPuV0CPthew=="
+  crossorigin=""></script>

    <style>
      #map {
@@ -38,17 +45,19 @@
    <div class="container">
      <h1>Relay Pool Data</h1>
      <div ng-if="relays === undefined" class="text-center">
-        <img src="//cdnjs.cloudflare.com/ajax/libs/galleriffic/2.0.1/css/loader.gif" alt=""/>
-        <p>Please wait while we gather data</p>
+        <img src="https://cdnjs.cloudflare.com/ajax/libs/galleriffic/2.0.1/css/loader.gif" alt=""/>
+        <p>Please wait while we gather data…</p>
      </div>
      <div>
        <div ng-show="relays !== undefined" class="ng-hide">
          <p>
-            Currently {{ relays.length }} relays online ({{ totals.goMaxProcs }} cores in total).
+            The relays listed on this page are not managed or vetted by the Syncthing project.
+            Each relay is the responsibility of the relay operator.
+            Currently {{ relays.length }} relays are online.
          </p>
        </div>
        <div id="map"></div> <!-- Can't hide the map, otherwise it freaks out -->
-        <p>The circle size represents how much bytes the relay transferred relative to other relays</p>
+        <p>The circle size represents how much bytes the relay has transferred relatively to other relays.</p>
      </div>
      <div>
        <table class="table table-striped table-condensed table">
@@ -179,15 +188,14 @@
      <hr>
      <p>
        This product includes GeoLite2 data created by MaxMind, available from
-        <a href="http://www.maxmind.com">http://www.maxmind.com</a>.
+        <a href="https://www.maxmind.com">https://www.maxmind.com</a>.
      </p>
    </div>


-    <script type="text/javascript" src="//code.jquery.com/jquery-2.1.4.min.js"></script>
-    <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
-    <script type="text/javascript" src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
-    <script type="text/javascript" src="//maps.googleapis.com/maps/api/js?key=AIzaSyDk5WJ8s7ueLKb99X5DbQ-vkWtPDAKqYs0"></script>
+    <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
+    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
+    <script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
  </body>

  <script>
@@ -228,11 +236,12 @@
      numProxies: 0,
      uptimeSeconds: 0,
    };
-    $scope.map = new google.maps.Map(document.getElementById('map'), {
-      zoom: 1,
-      mapTypeId: google.maps.MapTypeId.ROADMAP
-    });
-    $scope.mapBounds = new google.maps.LatLngBounds();
+    $scope.map = L.map('map').setView([40.90296, 1.90925], 2);
+    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
+    {
+      attribution: 'Leaflet',
+      maxZoom: 17
+    }).addTo($scope.map);
    $scope.tooltipTemplate = $('#infoTemplate').html();
    $scope.usedLocations = {};
    $scope.sortType = 'stats.numActiveSessions';
@@ -279,8 +288,9 @@
        }
      });

-      $scope.map.fitBounds($scope.mapBounds);
      if ($scope.relays.length == 1) {
+        //Center to only relay with zoom
+        $scope.map.panTo(new L.LatLng(relays[0].location.latitude, relays[0].location.longitude));
        $scope.map.setZoom(13);
      }
    });
@@ -300,44 +310,50 @@

        var locParts = loc.split(',');

-        relay.marker = new google.maps.Marker({
-          map: $scope.map,
-          position: new google.maps.LatLng(locParts[0], locParts[1]),
+        relay.marker = new L.Marker([relay.location.latitude, relay.location.longitude],{
          title: relay.url,
        });

        var scope = $rootScope.$new(true);
        scope.relay = relay;

-        relay.marker.info = new google.maps.InfoWindow({
-          content: $compile($scope.tooltipTemplate)(scope)[0],
+        var icon = new L.Icon({
+          iconSize:     [18, 28], // size of the icon
+          iconAnchor:   [9, 28], // point of the icon which will correspond to marker's location
+          shadowAnchor: [0, 0],  // the same for the shadow
+          popupAnchor:  [0, -27], // popup anchor
+          shadowSize:   [0,0],
+          iconUrl: 'https://cdn.rawgit.com/pointhi/leaflet-color-markers/master/img/marker-icon-red.png',
+          shadowUrl: 'https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/images/marker-shadow.png',
        });

+        relay.marker = new L.marker(new L.latLng(locParts[0], locParts[1]),{icon})
+                            .bindPopup($compile($scope.tooltipTemplate)(scope)[0],{})
+                            .on('mouseover', function (e) {
+                                this.openPopup();
+                            }).on('mouseout', function (e) {
+                                this.closePopup();
+                            }).addTo($scope.map);
+
        relay.showMarker = function() {
-          relay.marker.info.open($scope.map, relay.marker);
+          relay.marker.openPopup();
        }
-
+        
        relay.hideMarker = function() {
-          relay.marker.info.close();
+          relay.marker.closePopup();
        }
+      }

-        relay.marker.addListener('mouseover', relay.showMarker);
-        relay.marker.addListener('mouseout', relay.hideMarker);
-
-        $scope.mapBounds.extend(relay.marker.position);
-    }

    function addCircleToMap(relay) {
-      relay.marker.circle = new google.maps.Circle({
-        strokeColor: '#FF0000',
-        strokeOpacity: 0.8,
-        strokeWeight: 2,
-        fillColor: '#FF0000',
-        fillOpacity: 0.35,
-        map: $scope.map,
-        center: relay.marker.position,
-        radius: ((relay.stats.bytesProxied * 100) / $scope.totals.bytesProxied) * 10000
-      });
+      console.log(relay.location.latitude)
+      L.circle([relay.location.latitude, relay.location.longitude], 
+        {
+          radius: ((relay.stats.bytesProxied * 100) / $scope.totals.bytesProxied) * 10000,
+          color: "FF0000",
+          fillColor: "#FF0000",
+          fillOpacity: 0.35,
+        }).addTo($scope.map);
    }

    function constructURI(url) {
--- a/cmd/strelaypoolsrv/main.go
+++ b/cmd/strelaypoolsrv/main.go
@@ -1,22 +1,18 @@
 // Copyright (C) 2015 Audrius Butkevicius and Contributors (see the CONTRIBUTORS file).

-//go:generate go run ../../script/genassets.go gui >auto/gui.go
-
 package main

 import (
-	"bytes"
 	"compress/gzip"
 	"context"
 	"crypto/tls"
+	"crypto/x509"
 	"encoding/json"
-	"errors"
 	"flag"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
-	"mime"
 	"net"
 	"net/http"
 	"net/url"
@@ -26,11 +22,14 @@ import (
 	"strings"
 	"time"

+	"github.com/syncthing/syncthing/lib/protocol"
+
 	"github.com/golang/groupcache/lru"
 	"github.com/oschwald/geoip2-golang"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/syncthing/syncthing/cmd/strelaypoolsrv/auto"
+	"github.com/syncthing/syncthing/lib/assets"
 	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/sync"
@@ -95,33 +94,35 @@ type result struct {
 }

 var (
-	testCert        tls.Certificate
-	knownRelaysFile = filepath.Join(os.TempDir(), "strelaypoolsrv_known_relays")
-	listen          = ":80"
-	dir             string
-	evictionTime    = time.Hour
-	debug           bool
-	getLRUSize      = 10 << 10
-	getLimitBurst   = 10
-	getLimitAvg     = 2
-	postLRUSize     = 1 << 10
-	postLimitBurst  = 2
-	postLimitAvg    = 2
-	getLimit        time.Duration
-	postLimit       time.Duration
-	permRelaysFile  string
-	ipHeader        string
-	geoipPath       string
-	proto           string
-	statsRefresh    = time.Minute / 2
+	testCert          tls.Certificate
+	knownRelaysFile   = filepath.Join(os.TempDir(), "strelaypoolsrv_known_relays")
+	listen            = ":80"
+	dir               string
+	evictionTime      = time.Hour
+	debug             bool
+	getLRUSize        = 10 << 10
+	getLimitBurst     = 10
+	getLimitAvg       = 2
+	postLRUSize       = 1 << 10
+	postLimitBurst    = 2
+	postLimitAvg      = 2
+	getLimit          time.Duration
+	postLimit         time.Duration
+	permRelaysFile    string
+	ipHeader          string
+	geoipPath         string
+	proto             string
+	statsRefresh      = time.Minute / 2
+	requestQueueLen   = 10
+	requestProcessors = 1

-	getMut      = sync.NewRWMutex()
+	getMut      = sync.NewMutex()
 	getLRUCache *lru.Cache

-	postMut      = sync.NewRWMutex()
+	postMut      = sync.NewMutex()
 	postLRUCache *lru.Cache

-	requests = make(chan request, 10)
+	requests chan request

 	mut             = sync.NewRWMutex()
 	knownRelays     = make([]*relay, 0)
@@ -134,6 +135,9 @@ const (
 )

 func main() {
+	log.SetOutput(os.Stdout)
+	log.SetFlags(log.Lshortfile)
+
 	flag.StringVar(&listen, "listen", listen, "Listen address")
 	flag.StringVar(&dir, "keys", dir, "Directory where http-cert.pem and http-key.pem is stored for TLS listening")
 	flag.BoolVar(&debug, "debug", debug, "Enable debug output")
@@ -149,9 +153,13 @@ func main() {
 	flag.StringVar(&geoipPath, "geoip", "GeoLite2-City.mmdb", "Path to GeoLite2-City database")
 	flag.StringVar(&proto, "protocol", "tcp", "Protocol used for listening. 'tcp' for IPv4 and IPv6, 'tcp4' for IPv4, 'tcp6' for IPv6")
 	flag.DurationVar(&statsRefresh, "stats-refresh", statsRefresh, "Interval at which to refresh relay stats")
+	flag.IntVar(&requestQueueLen, "request-queue", requestQueueLen, "Queue length for incoming test requests")
+	flag.IntVar(&requestProcessors, "request-processors", requestProcessors, "Number of request processor routines")

 	flag.Parse()

+	requests = make(chan request, requestQueueLen)
+
 	getLimit = 10 * time.Second / time.Duration(getLimitAvg)
 	postLimit = time.Minute / time.Duration(postLimitAvg)

@@ -167,7 +175,9 @@ func main() {

 	testCert = createTestCertificate()

-	go requestProcessor()
+	for i := 0; i < requestProcessors; i++ {
+		go requestProcessor()
+	}

 	// Load relays from cache in the background.
 	// Load them in a serial fashion to make sure any genuine requests
@@ -201,6 +211,7 @@ func main() {
 		tlsCfg := &tls.Config{
 			Certificates: []tls.Certificate{cert},
 			MinVersion:   tls.VersionTLS10, // No SSLv3
+			ClientAuth:   tls.RequestClientCert,
 			CipherSuites: []uint16{
 				// No RC4
 				tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
@@ -256,88 +267,27 @@ func handleMetrics(w http.ResponseWriter, r *http.Request) {
 func handleAssets(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Cache-Control", "no-cache, must-revalidate")

-	assets := auto.Assets()
 	path := r.URL.Path[1:]
 	if path == "" {
 		path = "index.html"
 	}

-	bs, ok := assets[path]
+	as, ok := auto.Assets()[path]
 	if !ok {
 		w.WriteHeader(http.StatusNotFound)
 		return
 	}

-	etag := fmt.Sprintf("%d", auto.Generated)
-	modified := time.Unix(auto.Generated, 0).UTC()
-
-	w.Header().Set("Last-Modified", modified.Format(http.TimeFormat))
-	w.Header().Set("Etag", etag)
-
-	mtype := mimeTypeForFile(path)
-	if len(mtype) != 0 {
-		w.Header().Set("Content-Type", mtype)
-	}
-
-	if t, err := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); err == nil && modified.Add(time.Second).After(t) {
-		w.WriteHeader(http.StatusNotModified)
-		return
-	}
-
-	if match := r.Header.Get("If-None-Match"); match != "" {
-		if strings.Contains(match, etag) {
-			w.WriteHeader(http.StatusNotModified)
-			return
-		}
-	}
-	if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
-		w.Header().Set("Content-Encoding", "gzip")
-	} else {
-		// ungzip if browser not send gzip accepted header
-		var gr *gzip.Reader
-		gr, _ = gzip.NewReader(bytes.NewReader(bs))
-		bs, _ = ioutil.ReadAll(gr)
-		gr.Close()
-	}
-	w.Header().Set("Content-Length", fmt.Sprintf("%d", len(bs)))
-
-	w.Write(bs)
-}
-
-func mimeTypeForFile(file string) string {
-	// We use a built in table of the common types since the system
-	// TypeByExtension might be unreliable. But if we don't know, we delegate
-	// to the system.
-	ext := filepath.Ext(file)
-	switch ext {
-	case ".htm", ".html":
-		return "text/html"
-	case ".css":
-		return "text/css"
-	case ".js":
-		return "application/javascript"
-	case ".json":
-		return "application/json"
-	case ".png":
-		return "image/png"
-	case ".ttf":
-		return "application/x-font-ttf"
-	case ".woff":
-		return "application/x-font-woff"
-	case ".svg":
-		return "image/svg+xml"
-	default:
-		return mime.TypeByExtension(ext)
-	}
+	assets.Serve(w, r, as)
 }

 func handleRequest(w http.ResponseWriter, r *http.Request) {
 	timer := prometheus.NewTimer(apiRequestsSeconds.WithLabelValues(r.Method))

-	lw := NewLoggingResponseWriter(w)
-
+	w = NewLoggingResponseWriter(w)
 	defer func() {
 		timer.ObserveDuration()
+		lw := w.(*loggingResponseWriter)
 		apiRequestsTotal.WithLabelValues(r.Method, strconv.Itoa(lw.statusCode)).Inc()
 	}()

@@ -368,8 +318,11 @@ func handleRequest(w http.ResponseWriter, r *http.Request) {

 func handleGetRequest(rw http.ResponseWriter, r *http.Request) {
 	rw.Header().Set("Content-Type", "application/json; charset=utf-8")
+
 	mut.RLock()
-	relays := append(permanentRelays, knownRelays...)
+	relays := make([]*relay, len(permanentRelays)+len(knownRelays))
+	n := copy(relays, permanentRelays)
+	copy(relays[n:], knownRelays)
 	mut.RUnlock()

 	// Shuffle
@@ -389,6 +342,12 @@ func handleGetRequest(rw http.ResponseWriter, r *http.Request) {
 }

 func handlePostRequest(w http.ResponseWriter, r *http.Request) {
+	var relayCert *x509.Certificate
+	if r.TLS != nil && len(r.TLS.PeerCertificates) > 0 {
+		relayCert = r.TLS.PeerCertificates[0]
+		log.Printf("Got TLS cert from relay server")
+	}
+
 	var newRelay relay
 	err := json.NewDecoder(r.Body).Decode(&newRelay)
 	r.Body.Close()
@@ -397,7 +356,7 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 		if debug {
 			log.Println("Failed to parse payload")
 		}
-		http.Error(w, err.Error(), 500)
+		http.Error(w, err.Error(), http.StatusBadRequest)
 		return
 	}

@@ -406,16 +365,26 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 		if debug {
 			log.Println("Failed to parse URI", newRelay.URL)
 		}
-		http.Error(w, err.Error(), 500)
+		http.Error(w, err.Error(), http.StatusBadRequest)
 		return
 	}

+	if relayCert != nil {
+		advertisedId := uri.Query().Get("id")
+		idFromCert := protocol.NewDeviceID(relayCert.Raw).String()
+		if advertisedId != idFromCert {
+			log.Println("Warning: Relay server requested to join with an ID different from the join request, rejecting")
+			http.Error(w, "mismatched advertised id and join request cert", http.StatusBadRequest)
+			return
+		}
+	}
+
 	host, port, err := net.SplitHostPort(uri.Host)
 	if err != nil {
 		if debug {
 			log.Println("Failed to split URI", newRelay.URL)
 		}
-		http.Error(w, err.Error(), 500)
+		http.Error(w, err.Error(), http.StatusBadRequest)
 		return
 	}

@@ -430,7 +399,7 @@ func handlePostRequest(w http.ResponseWriter, r *http.Request) {
 	if ip == nil || ip.IsUnspecified() {
 		uri.Host = net.JoinHostPort(rhost, port)
 		newRelay.URL = uri.String()
-	} else if host != rhost {
+	} else if host != rhost && relayCert == nil {
 		if debug {
 			log.Println("IP address advertised does not match client IP address", r.RemoteAddr, uri)
 		}
@@ -491,11 +460,11 @@ func handleRelayTest(request request) {
 	if debug {
 		log.Println("Request for", request.relay)
 	}
-	if !client.TestRelay(context.TODO(), request.relay.uri, []tls.Certificate{testCert}, time.Second, 2*time.Second, 3) {
+	if err := client.TestRelay(context.TODO(), request.relay.uri, []tls.Certificate{testCert}, time.Second, 2*time.Second, 3); err != nil {
 		if debug {
-			log.Println("Test for relay", request.relay, "failed")
+			log.Println("Test for relay", request.relay, "failed:", err)
 		}
-		request.result <- result{errors.New("connection test failed"), 0}
+		request.result <- result{err, 0}
 		return
 	}

@@ -507,7 +476,7 @@ func handleRelayTest(request request) {
 		updateMetrics(request.relay.uri.Host, *stats, location)
 	}
 	request.relay.Stats = stats
-	request.relay.StatsRetrieved = time.Now()
+	request.relay.StatsRetrieved = time.Now().Truncate(time.Second)
 	request.relay.Location = location

 	timer, ok := evictionTimers[request.relay.uri.Host]
@@ -573,26 +542,21 @@ func evict(relay *relay) func() {
 	}
 }

-func limit(addr string, cache *lru.Cache, lock sync.RWMutex, intv time.Duration, burst int) bool {
+func limit(addr string, cache *lru.Cache, lock sync.Mutex, intv time.Duration, burst int) bool {
 	if host, _, err := net.SplitHostPort(addr); err == nil {
 		addr = host
 	}

-	lock.RLock()
-	bkt, ok := cache.Get(addr)
-	lock.RUnlock()
-	if ok {
-		bkt := bkt.(*rate.Limiter)
-		if !bkt.Allow() {
-			// Rate limit
-			return true
-		}
-	} else {
-		lock.Lock()
-		cache.Add(addr, rate.NewLimiter(rate.Every(intv), burst))
-		lock.Unlock()
+	lock.Lock()
+	v, _ := cache.Get(addr)
+	bkt, ok := v.(*rate.Limiter)
+	if !ok {
+		bkt = rate.NewLimiter(rate.Every(intv), burst)
+		cache.Add(addr, bkt)
 	}
-	return false
+	lock.Unlock()
+
+	return !bkt.Allow()
 }

 func loadRelays(file string) []*relay {
--- a/cmd/strelaypoolsrv/main_test.go
+++ b/cmd/strelaypoolsrv/main_test.go
@@ -0,0 +1,67 @@
+// Copyright © 2020 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http/httptest"
+	"strings"
+	"sync"
+	"testing"
+)
+
+func init() {
+	for i := 0; i < 10; i++ {
+		u := fmt.Sprintf("permanent%d", i)
+		permanentRelays = append(permanentRelays, &relay{URL: u})
+	}
+
+	knownRelays = []*relay{
+		{URL: "known1"},
+		{URL: "known2"},
+		{URL: "known3"},
+	}
+
+	mut = new(sync.RWMutex)
+}
+
+// Regression test: handleGetRequest should not modify permanentRelays.
+func TestHandleGetRequest(t *testing.T) {
+	needcap := len(permanentRelays) + len(knownRelays)
+	if needcap > cap(permanentRelays) {
+		t.Fatalf("test setup failed: need cap(permanentRelays) >= %d, have %d",
+			needcap, cap(permanentRelays))
+	}
+
+	w := httptest.NewRecorder()
+	w.Body = new(bytes.Buffer)
+	handleGetRequest(w, httptest.NewRequest("GET", "/", nil))
+
+	result := make(map[string][]*relay)
+	err := json.NewDecoder(w.Body).Decode(&result)
+	if err != nil {
+		t.Fatalf("invalid JSON: %v", err)
+	}
+
+	relays := result["relays"]
+	expect, actual := len(knownRelays)+len(permanentRelays), len(relays)
+	if actual != expect {
+		t.Errorf("expected %d relays, got %d", expect, actual)
+	}
+
+	// Check for changes in permanentRelays.
+	for i, r := range permanentRelays {
+		switch {
+		case !strings.HasPrefix(r.URL, "permanent"):
+			t.Errorf("relay %q among permanent relays", r.URL)
+		case r.URL != fmt.Sprintf("permanent%d", i):
+			t.Error("order of permanent relays changed")
+		}
+	}
+}
--- a/cmd/strelaysrv/README.md
+++ b/cmd/strelaysrv/README.md
@@ -121,11 +121,11 @@ Relay related libraries used by this repo
 ----
 ##### Relay protocol definition.

-[Available here](https://github.com/syncthing/syncthing/tree/master/lib/relay/protocol)
+[Available here](https://github.com/syncthing/syncthing/tree/main/lib/relay/protocol)


 ##### Relay client

 Only used by the testutil.

-[Available here](https://github.com/syncthing/syncthing/tree/master/lib/relay/client)
+[Available here](https://github.com/syncthing/syncthing/tree/main/lib/relay/client)
--- a/cmd/strelaysrv/listener.go
+++ b/cmd/strelaysrv/listener.go
@@ -149,7 +149,15 @@ func protocolConnectionHandler(tcpConn net.Conn, config *tls.Config) {
 				protocol.WriteMessage(conn, protocol.ResponseSuccess)

 			case protocol.ConnectRequest:
-				requestedPeer := syncthingprotocol.DeviceIDFromBytes(msg.ID)
+				requestedPeer, err := syncthingprotocol.DeviceIDFromBytes(msg.ID)
+				if err != nil {
+					if debug {
+						log.Println(id, "is looking for an invalid peer ID")
+					}
+					protocol.WriteMessage(conn, protocol.ResponseNotFound)
+					conn.Close()
+					continue
+				}
 				outboxesMut.RLock()
 				peerOutbox, ok := outboxes[requestedPeer]
 				outboxesMut.RUnlock()
--- a/cmd/strelaysrv/main.go
+++ b/cmd/strelaysrv/main.go
@@ -3,6 +3,7 @@
 package main

 import (
+	"context"
 	"crypto/tls"
 	"flag"
 	"fmt"
@@ -98,12 +99,13 @@ func main() {
 	flag.IntVar(&natRenewal, "nat-renewal", 30, "NAT renewal frequency in minutes")
 	flag.IntVar(&natTimeout, "nat-timeout", 10, "NAT discovery timeout in seconds")
 	flag.BoolVar(&pprofEnabled, "pprof", false, "Enable the built in profiling on the status server")
-	flag.IntVar(&networkBufferSize, "network-buffer", 2048, "Network buffer size (two of these per proxied connection)")
+	flag.IntVar(&networkBufferSize, "network-buffer", 65536, "Network buffer size (two of these per proxied connection)")
 	showVersion := flag.Bool("version", false, "Show version")
 	flag.Parse()

+	longVer := build.LongVersionFor("strelaysrv")
 	if *showVersion {
-		fmt.Println(build.LongVersion)
+		fmt.Println(longVer)
 		return
 	}

@@ -135,7 +137,7 @@ func main() {
 		}
 	}

-	log.Println(build.LongVersion)
+	log.Println(longVer)

 	maxDescriptors, err := osutil.MaximizeOpenFileLimit()
 	if maxDescriptors > 0 {
@@ -183,17 +185,20 @@ func main() {
 		log.Println("ID:", id)
 	}

-	wrapper := config.Wrap("config", config.New(id), events.NoopLogger)
-	wrapper.SetOptions(config.OptionsConfiguration{
-		NATLeaseM:   natLease,
-		NATRenewalM: natRenewal,
-		NATTimeoutS: natTimeout,
+	wrapper := config.Wrap("config", config.New(id), id, events.NoopLogger)
+	go wrapper.Serve(context.TODO())
+	wrapper.Modify(func(cfg *config.Configuration) {
+		cfg.Options.NATLeaseM = natLease
+		cfg.Options.NATRenewalM = natRenewal
+		cfg.Options.NATTimeoutS = natTimeout
 	})
 	natSvc := nat.NewService(id, wrapper)
 	mapping := mapping{natSvc.NewMapping(nat.TCP, addr.IP, addr.Port)}

 	if natEnabled {
-		go natSvc.Serve()
+		ctx, cancel := context.WithCancel(context.Background())
+		go natSvc.Serve(ctx)
+		defer cancel()
 		found := make(chan struct{})
 		mapping.OnChanged(func(_ *nat.Mapping, _, _ []nat.Address) {
 			select {
@@ -228,6 +233,7 @@ func main() {
 	uri, err := url.Parse(fmt.Sprintf("relay://%s/?id=%s&pingInterval=%s&networkTimeout=%s&sessionLimitBps=%d&globalLimitBps=%d&statusAddr=%s&providedBy=%s", mapping.Address(), id, pingInterval, networkTimeout, sessionLimitBps, globalLimitBps, statusAddr, providedBy))
 	if err != nil {
 		log.Fatalln("Failed to construct URI", err)
+		return
 	}

 	log.Println("URI:", uri.String())
@@ -243,7 +249,7 @@ func main() {
 	for _, pool := range pools {
 		pool = strings.TrimSpace(pool)
 		if len(pool) > 0 {
-			go poolHandler(pool, uri, mapping)
+			go poolHandler(pool, uri, mapping, cert)
 		}
 	}

--- a/cmd/strelaysrv/pool.go
+++ b/cmd/strelaysrv/pool.go
@@ -4,14 +4,20 @@ package main

 import (
 	"bytes"
+	"crypto/tls"
 	"encoding/json"
 	"io/ioutil"
 	"log"
+	"net/http"
 	"net/url"
 	"time"
 )

-func poolHandler(pool string, uri *url.URL, mapping mapping) {
+const (
+	httpStatusEnhanceYourCalm = 429
+)
+
+func poolHandler(pool string, uri *url.URL, mapping mapping, ownCert tls.Certificate) {
 	if debug {
 		log.Println("Joining", pool)
 	}
@@ -26,40 +32,81 @@ func poolHandler(pool string, uri *url.URL, mapping mapping) {
 			uriCopy.String(),
 		})

-		resp, err := httpClient.Post(pool, "application/json", &b)
+		poolUrl, err := url.Parse(pool)
 		if err != nil {
-			log.Println("Error joining pool", pool, err)
-		} else if resp.StatusCode == 500 {
-			bs, err := ioutil.ReadAll(resp.Body)
-			if err != nil {
-				log.Println("Failed to join", pool, "due to an internal server error. Could not read response:", err)
-			} else {
-				log.Println("Failed to join", pool, "due to an internal server error:", string(bs))
+			log.Printf("Could not parse pool url '%s': %v", pool, err)
+		}
+
+		client := http.DefaultClient
+		if poolUrl.Scheme == "https" {
+			// Sent our certificate in join request
+			client = &http.Client{
+				Transport: &http.Transport{
+					TLSClientConfig: &tls.Config{
+						Certificates: []tls.Certificate{ownCert},
+					},
+				},
 			}
-			resp.Body.Close()
-		} else if resp.StatusCode == 429 {
-			log.Println(pool, "under load, will retry in a minute")
+		}
+
+		resp, err := client.Post(pool, "application/json", &b)
+		if err != nil {
+			log.Printf("Error joining pool %v: HTTP request: %v", pool, err)
 			time.Sleep(time.Minute)
 			continue
-		} else if resp.StatusCode == 401 {
-			log.Println(pool, "failed to join due to IP address not matching external address. Aborting")
-			return
-		} else if resp.StatusCode == 200 {
+		}
+
+		bs, err := ioutil.ReadAll(resp.Body)
+		resp.Body.Close()
+		if err != nil {
+			log.Printf("Error joining pool %v: reading response: %v", pool, err)
+			time.Sleep(time.Minute)
+			continue
+		}
+
+		switch resp.StatusCode {
+		case http.StatusOK:
 			var x struct {
 				EvictionIn time.Duration `json:"evictionIn"`
 			}
-			err := json.NewDecoder(resp.Body).Decode(&x)
-			if err == nil {
+			if err := json.Unmarshal(bs, &x); err == nil {
 				rejoin := x.EvictionIn - (x.EvictionIn / 5)
-				log.Println("Joined", pool, "rejoining in", rejoin)
+				log.Printf("Joined pool %s, rejoining in %v", pool, rejoin)
 				time.Sleep(rejoin)
 				continue
 			} else {
-				log.Println("Failed to deserialize response", err)
+				log.Printf("Joined pool %s, failed to deserialize response: %v", pool, err)
 			}
-		} else {
-			log.Println(pool, "unknown response type from server", resp.StatusCode)
+
+		case http.StatusInternalServerError:
+			log.Printf("Failed to join %v: server error", pool)
+			log.Printf("Response data: %s", bs)
+			time.Sleep(time.Minute)
+			continue
+
+		case http.StatusBadRequest:
+			log.Printf("Failed to join %v: request or check error", pool)
+			log.Printf("Response data: %s", bs)
+			time.Sleep(time.Minute)
+			continue
+
+		case httpStatusEnhanceYourCalm:
+			log.Printf("Failed to join %v: under load (rate limiting)", pool)
+			time.Sleep(time.Minute)
+			continue
+
+		case http.StatusUnauthorized:
+			log.Printf("Failed to join %v: IP address not matching external address", pool)
+			log.Println("Aborting")
+			return
+
+		default:
+			log.Printf("Failed to join %v: unexpected status code from server: %d", pool, resp.StatusCode)
+			log.Printf("Response data: %s", bs)
+			time.Sleep(time.Minute)
+			continue
 		}
+
 		time.Sleep(time.Hour)
 	}
 }
--- a/cmd/strelaysrv/testutil/main.go
+++ b/cmd/strelaysrv/testutil/main.go
@@ -20,7 +20,8 @@ import (
 )

 func main() {
-	ctx := context.Background()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()

 	log.SetOutput(os.Stdout)
 	log.SetFlags(log.LstdFlags | log.Lshortfile)
@@ -56,13 +57,13 @@ func main() {

 	if join {
 		log.Println("Creating client")
-		relay, err := client.NewClient(uri, []tls.Certificate{cert}, nil, 10*time.Second)
+		relay, err := client.NewClient(uri, []tls.Certificate{cert}, 10*time.Second)
 		if err != nil {
 			log.Fatal(err)
 		}
 		log.Println("Created client")

-		go relay.Serve()
+		go relay.Serve(ctx)

 		recv := make(chan protocol.SessionInvitation)

@@ -107,10 +108,10 @@ func main() {
 		connectToStdio(stdin, conn)
 		log.Println("Finished", conn.RemoteAddr(), conn.LocalAddr())
 	} else if test {
-		if client.TestRelay(ctx, uri, []tls.Certificate{cert}, time.Second, 2*time.Second, 4) {
+		if err := client.TestRelay(ctx, uri, []tls.Certificate{cert}, time.Second, 2*time.Second, 4); err == nil {
 			log.Println("OK")
 		} else {
-			log.Println("FAIL")
+			log.Println("FAIL:", err)
 		}
 	} else {
 		log.Fatal("Requires either join or connect")
--- a/cmd/stvanity/main.go
+++ b/cmd/stvanity/main.go
@@ -37,7 +37,7 @@ type result struct {

 func main() {
 	flag.Parse()
-	prefix := strings.ToUpper(strings.Replace(flag.Arg(0), "-", "", -1))
+	prefix := strings.ToUpper(strings.ReplaceAll(flag.Arg(0), "-", ""))
 	if len(prefix) > 7 {
 		prefix = prefix[:7] + "-" + prefix[7:]
 	}
--- a/cmd/stwatchfile/main.go
+++ b/cmd/stwatchfile/main.go
@@ -7,31 +7,15 @@
 package main

 import (
-	"bytes"
-	"crypto/md5"
 	"flag"
 	"fmt"
 	"io"
 	"os"
 	"time"
+
+	"github.com/syncthing/syncthing/lib/sha256"
 )

-func getmd5(filePath string) ([]byte, error) {
-	var result []byte
-	file, err := os.Open(filePath)
-	if err != nil {
-		return result, err
-	}
-	defer file.Close()
-
-	hash := md5.New()
-	if _, err := io.Copy(hash, file); err != nil {
-		return result, err
-	}
-
-	return hash.Sum(result), nil
-}
-
 func main() {
 	period := flag.Duration("period", 200*time.Millisecond, "Sleep period between checks")
 	flag.Parse()
@@ -46,7 +30,7 @@ func main() {
 	exists := true
 	size := int64(0)
 	mtime := time.Time{}
-	hash := []byte{}
+	var hash [sha256.Size]byte

 	for {
 		time.Sleep(*period)
@@ -72,7 +56,7 @@ func main() {
 		if !exists {
 			size = 0
 			mtime = time.Time{}
-			hash = []byte{}
+			hash = [sha256.Size]byte{}
 			continue
 		}

@@ -83,12 +67,12 @@ func main() {
 		newSize := fi.Size()
 		newMtime := fi.ModTime()

-		newHash, err := getmd5(file)
+		newHash, err := sha256file(file)
 		if err != nil {
-			fmt.Println("getmd5:", err)
+			fmt.Println("sha256file:", err)
 		}

-		if newSize != size || newMtime != mtime || !bytes.Equal(newHash, hash) {
+		if newSize != size || newMtime != mtime || newHash != hash {
 			fmt.Println(file, "Size:", newSize, "Mtime:", newMtime, "Hash:", fmt.Sprintf("%x", newHash))
 			hash = newHash
 			size = newSize
@@ -96,3 +80,18 @@ func main() {
 		}
 	}
 }
+
+func sha256file(fname string) (hash [sha256.Size]byte, err error) {
+	f, err := os.Open(fname)
+	if err != nil {
+		return
+	}
+	defer f.Close()
+
+	h := sha256.New()
+	io.Copy(h, f)
+	hb := h.Sum(nil)
+	copy(hash[:], hb)
+
+	return
+}
--- a/cmd/syncthing/blockprof.go
+++ b/cmd/syncthing/blockprof.go
@@ -15,19 +15,17 @@ import (
 	"time"
 )

-func init() {
-	if innerProcess && os.Getenv("STBLOCKPROFILE") != "" {
-		profiler := pprof.Lookup("block")
-		if profiler == nil {
-			panic("Couldn't find block profiler")
-		}
-		l.Debugln("Starting block profiling")
-		go func() {
-			err := saveBlockingProfiles(profiler) // Only returns on error
-			l.Warnln("Block profiler failed:", err)
-			panic("Block profiler failed")
-		}()
+func startBlockProfiler() {
+	profiler := pprof.Lookup("block")
+	if profiler == nil {
+		panic("Couldn't find block profiler")
 	}
+	l.Debugln("Starting block profiling")
+	go func() {
+		err := saveBlockingProfiles(profiler) // Only returns on error
+		l.Warnln("Block profiler failed:", err)
+		panic("Block profiler failed")
+	}()
 }

 func saveBlockingProfiles(profiler *pprof.Profile) error {
--- a/cmd/syncthing/cli/client.go
+++ b/cmd/syncthing/cli/client.go
@@ -0,0 +1,153 @@
+// Copyright (C) 2019 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/locations"
+	"github.com/syncthing/syncthing/lib/protocol"
+)
+
+type APIClient interface {
+	Get(url string) (*http.Response, error)
+	Post(url, body string) (*http.Response, error)
+}
+
+type apiClient struct {
+	http.Client
+	cfg    config.GUIConfiguration
+	apikey string
+}
+
+type apiClientFactory struct {
+	cfg config.GUIConfiguration
+}
+
+func (f *apiClientFactory) getClient() (APIClient, error) {
+	// Now if the API key and address is not provided (we are not connecting to a remote instance),
+	// try to rip it out of the config.
+	if f.cfg.RawAddress == "" && f.cfg.APIKey == "" {
+		var err error
+		f.cfg, err = loadGUIConfig()
+		if err != nil {
+			return nil, err
+		}
+	} else if f.cfg.Address() == "" || f.cfg.APIKey == "" {
+		return nil, errors.New("Both --gui-address and --gui-apikey should be specified")
+	}
+
+	httpClient := http.Client{
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				InsecureSkipVerify: true,
+			},
+			DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
+				return net.Dial(f.cfg.Network(), f.cfg.Address())
+			},
+		},
+	}
+	return &apiClient{
+		Client: httpClient,
+		cfg:    f.cfg,
+		apikey: f.cfg.APIKey,
+	}, nil
+}
+
+func loadGUIConfig() (config.GUIConfiguration, error) {
+	// Load the certs and get the ID
+	cert, err := tls.LoadX509KeyPair(
+		locations.Get(locations.CertFile),
+		locations.Get(locations.KeyFile),
+	)
+	if err != nil {
+		return config.GUIConfiguration{}, fmt.Errorf("reading device ID: %w", err)
+	}
+
+	myID := protocol.NewDeviceID(cert.Certificate[0])
+
+	// Load the config
+	cfg, _, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
+	if err != nil {
+		return config.GUIConfiguration{}, fmt.Errorf("loading config: %w", err)
+	}
+
+	guiCfg := cfg.GUI()
+
+	if guiCfg.Address() == "" {
+		return config.GUIConfiguration{}, errors.New("Could not find GUI Address")
+	}
+
+	if guiCfg.APIKey == "" {
+		return config.GUIConfiguration{}, errors.New("Could not find GUI API key")
+	}
+
+	return guiCfg, nil
+}
+
+func (c *apiClient) Endpoint() string {
+	if c.cfg.Network() == "unix" {
+		return "http://unix/"
+	}
+	url := c.cfg.URL()
+	if !strings.HasSuffix(url, "/") {
+		url += "/"
+	}
+	return url
+}
+
+func (c *apiClient) Do(req *http.Request) (*http.Response, error) {
+	req.Header.Set("X-API-Key", c.apikey)
+	resp, err := c.Client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	return resp, checkResponse(resp)
+}
+
+func (c *apiClient) Get(url string) (*http.Response, error) {
+	request, err := http.NewRequest("GET", c.Endpoint()+"rest/"+url, nil)
+	if err != nil {
+		return nil, err
+	}
+	return c.Do(request)
+}
+
+func (c *apiClient) Post(url, body string) (*http.Response, error) {
+	request, err := http.NewRequest("POST", c.Endpoint()+"rest/"+url, bytes.NewBufferString(body))
+	if err != nil {
+		return nil, err
+	}
+	return c.Do(request)
+}
+
+var errNotFound = errors.New("invalid endpoint or API call")
+
+func checkResponse(response *http.Response) error {
+	if response.StatusCode == http.StatusNotFound {
+		return errNotFound
+	} else if response.StatusCode == http.StatusUnauthorized {
+		return errors.New("invalid API key")
+	} else if response.StatusCode != http.StatusOK {
+		data, err := responseToBArray(response)
+		if err != nil {
+			return err
+		}
+		body := strings.TrimSpace(string(data))
+		return fmt.Errorf("unexpected HTTP status returned: %s\n%s", response.Status, body)
+	}
+	return nil
+}
--- a/cmd/syncthing/cli/config.go
+++ b/cmd/syncthing/cli/config.go
@@ -0,0 +1,87 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+
+	"github.com/AudriusButkevicius/recli"
+	"github.com/pkg/errors"
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/urfave/cli"
+)
+
+type configHandler struct {
+	original, cfg config.Configuration
+	client        APIClient
+	err           error
+}
+
+func getConfigCommand(f *apiClientFactory) (cli.Command, error) {
+	h := new(configHandler)
+	h.client, h.err = f.getClient()
+	if h.err == nil {
+		h.cfg, h.err = getConfig(h.client)
+	}
+	h.original = h.cfg.Copy()
+
+	// Copy the config and set the default flags
+	recliCfg := recli.DefaultConfig
+	recliCfg.IDTag.Name = "xml"
+	recliCfg.SkipTag.Name = "json"
+
+	commands, err := recli.New(recliCfg).Construct(&h.cfg)
+	if err != nil {
+		return cli.Command{}, fmt.Errorf("config reflect: %w", err)
+	}
+
+	return cli.Command{
+		Name:        "config",
+		HideHelp:    true,
+		Usage:       "Configuration modification command group",
+		Subcommands: commands,
+		Before:      h.configBefore,
+		After:       h.configAfter,
+	}, nil
+}
+
+func (h *configHandler) configBefore(c *cli.Context) error {
+	for _, arg := range c.Args() {
+		if arg == "--help" || arg == "-h" {
+			return nil
+		}
+	}
+	return h.err
+}
+
+func (h *configHandler) configAfter(c *cli.Context) error {
+	if h.err != nil {
+		// Error was already returned in configBefore
+		return nil
+	}
+	if reflect.DeepEqual(h.cfg, h.original) {
+		return nil
+	}
+	body, err := json.MarshalIndent(h.cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	resp, err := h.client.Post("system/config", string(body))
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode != 200 {
+		body, err := responseToBArray(resp)
+		if err != nil {
+			return err
+		}
+		return errors.New(string(body))
+	}
+	return nil
+}
--- a/cmd/syncthing/cli/debug.go
+++ b/cmd/syncthing/cli/debug.go
@@ -0,0 +1,55 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"fmt"
+	"net/url"
+
+	"github.com/urfave/cli"
+)
+
+var debugCommand = cli.Command{
+	Name:     "debug",
+	HideHelp: true,
+	Usage:    "Debug command group",
+	Subcommands: []cli.Command{
+		{
+			Name:      "file",
+			Usage:     "Show information about a file (or directory/symlink)",
+			ArgsUsage: "FOLDER-ID PATH",
+			Action:    expects(2, debugFile()),
+		},
+		indexCommand,
+		{
+			Name:      "profile",
+			Usage:     "Save a profile to help figuring out what Syncthing does.",
+			ArgsUsage: "cpu | heap",
+			Action:    expects(1, profile()),
+		},
+	},
+}
+
+func debugFile() cli.ActionFunc {
+	return func(c *cli.Context) error {
+		query := make(url.Values)
+		query.Set("folder", c.Args()[0])
+		query.Set("file", normalizePath(c.Args()[1]))
+		return indexDumpOutput("debug/file?" + query.Encode())(c)
+	}
+}
+
+func profile() cli.ActionFunc {
+	return func(c *cli.Context) error {
+		switch t := c.Args()[0]; t {
+		case "cpu", "heap":
+			return saveToFile(fmt.Sprintf("debug/%vprof", c.Args()[0]))(c)
+		default:
+			return fmt.Errorf("expected cpu or heap as argument, got %v", t)
+		}
+	}
+}
--- a/cmd/syncthing/cli/errors.go
+++ b/cmd/syncthing/cli/errors.go
@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"errors"
@@ -22,7 +22,7 @@ var errorsCommand = cli.Command{
 		{
 			Name:   "show",
 			Usage:  "Show pending errors",
-			Action: expects(0, dumpOutput("system/error")),
+			Action: expects(0, indexDumpOutput("system/error")),
 		},
 		{
 			Name:      "push",
@@ -39,7 +39,7 @@ var errorsCommand = cli.Command{
 }

 func errorsPush(c *cli.Context) error {
-	client := c.App.Metadata["client"].(*APIClient)
+	client := c.App.Metadata["client"].(APIClient)
 	errStr := strings.Join(c.Args(), " ")
 	response, err := client.Post("system/error", strings.TrimSpace(errStr))
 	if err != nil {
--- a/cmd/syncthing/cli/index.go
+++ b/cmd/syncthing/cli/index.go
@@ -0,0 +1,38 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"github.com/urfave/cli"
+)
+
+var indexCommand = cli.Command{
+	Name:  "index",
+	Usage: "Show information about the index (database)",
+	Subcommands: []cli.Command{
+		{
+			Name:   "dump",
+			Usage:  "Print the entire db",
+			Action: expects(0, indexDump),
+		},
+		{
+			Name:   "dump-size",
+			Usage:  "Print the db size of different categories of information",
+			Action: expects(0, indexDumpSize),
+		},
+		{
+			Name:   "check",
+			Usage:  "Check the database for inconsistencies",
+			Action: expects(0, indexCheck),
+		},
+		{
+			Name:   "account",
+			Usage:  "Print key and value size statistics per key type",
+			Action: expects(0, indexAccount),
+		},
+	},
+}
--- a/cmd/syncthing/cli/index_accounting.go
+++ b/cmd/syncthing/cli/index_accounting.go
@@ -4,22 +4,26 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"fmt"
-	"log"
 	"os"
 	"text/tabwriter"

-	"github.com/syncthing/syncthing/lib/db/backend"
+	"github.com/urfave/cli"
 )

-// account prints key and data size statistics per class
-func account(ldb backend.Backend) {
+// indexAccount prints key and data size statistics per class
+func indexAccount(*cli.Context) error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}

 	var ksizes [256]int
@@ -55,4 +59,6 @@ func account(ldb backend.Backend) {
 	}
 	fmt.Fprintf(tw, "Total\t%d items,\t%d KB keys +\t%d KB data.\t\n", toti, totks/1000, totds/1000)
 	tw.Flush()
+
+	return nil
 }
--- a/cmd/syncthing/cli/index_dump.go
+++ b/cmd/syncthing/cli/index_dump.go
@@ -0,0 +1,160 @@
+// Copyright (C) 2015 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"encoding/binary"
+	"fmt"
+	"time"
+
+	"github.com/urfave/cli"
+
+	"github.com/syncthing/syncthing/lib/db"
+	"github.com/syncthing/syncthing/lib/protocol"
+)
+
+func indexDump(*cli.Context) error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+	it, err := ldb.NewPrefixIterator(nil)
+	if err != nil {
+		return err
+	}
+	for it.Next() {
+		key := it.Key()
+		switch key[0] {
+		case db.KeyTypeDevice:
+			folder := binary.BigEndian.Uint32(key[1:])
+			device := binary.BigEndian.Uint32(key[1+4:])
+			name := nulString(key[1+4+4:])
+			fmt.Printf("[device] F:%d D:%d N:%q", folder, device, name)
+
+			var f protocol.FileInfo
+			err := f.Unmarshal(it.Value())
+			if err != nil {
+				return err
+			}
+			fmt.Printf(" V:%v\n", f)
+
+		case db.KeyTypeGlobal:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			var flv db.VersionList
+			flv.Unmarshal(it.Value())
+			fmt.Printf("[global] F:%d N:%q V:%s\n", folder, name, flv)
+
+		case db.KeyTypeBlock:
+			folder := binary.BigEndian.Uint32(key[1:])
+			hash := key[1+4 : 1+4+32]
+			name := nulString(key[1+4+32:])
+			fmt.Printf("[block] F:%d H:%x N:%q I:%d\n", folder, hash, name, binary.BigEndian.Uint32(it.Value()))
+
+		case db.KeyTypeDeviceStatistic:
+			fmt.Printf("[dstat] K:%x V:%x\n", key, it.Value())
+
+		case db.KeyTypeFolderStatistic:
+			fmt.Printf("[fstat] K:%x V:%x\n", key, it.Value())
+
+		case db.KeyTypeVirtualMtime:
+			folder := binary.BigEndian.Uint32(key[1:])
+			name := nulString(key[1+4:])
+			val := it.Value()
+			var realTime, virtualTime time.Time
+			realTime.UnmarshalBinary(val[:len(val)/2])
+			virtualTime.UnmarshalBinary(val[len(val)/2:])
+			fmt.Printf("[mtime] F:%d N:%q R:%v V:%v\n", folder, name, realTime, virtualTime)
+
+		case db.KeyTypeFolderIdx:
+			key := binary.BigEndian.Uint32(key[1:])
+			fmt.Printf("[folderidx] K:%d V:%q\n", key, it.Value())
+
+		case db.KeyTypeDeviceIdx:
+			key := binary.BigEndian.Uint32(key[1:])
+			val := it.Value()
+			device := "<nil>"
+			if len(val) > 0 {
+				dev, err := protocol.DeviceIDFromBytes(val)
+				if err != nil {
+					device = fmt.Sprintf("<invalid %d bytes>", len(val))
+				} else {
+					device = dev.String()
+				}
+			}
+			fmt.Printf("[deviceidx] K:%d V:%s\n", key, device)
+
+		case db.KeyTypeIndexID:
+			device := binary.BigEndian.Uint32(key[1:])
+			folder := binary.BigEndian.Uint32(key[5:])
+			fmt.Printf("[indexid] D:%d F:%d I:%x\n", device, folder, it.Value())
+
+		case db.KeyTypeFolderMeta:
+			folder := binary.BigEndian.Uint32(key[1:])
+			fmt.Printf("[foldermeta] F:%d", folder)
+			var cs db.CountsSet
+			if err := cs.Unmarshal(it.Value()); err != nil {
+				fmt.Printf(" (invalid)\n")
+			} else {
+				fmt.Printf(" V:%v\n", cs)
+			}
+
+		case db.KeyTypeMiscData:
+			fmt.Printf("[miscdata] K:%q V:%q\n", key[1:], it.Value())
+
+		case db.KeyTypeSequence:
+			folder := binary.BigEndian.Uint32(key[1:])
+			seq := binary.BigEndian.Uint64(key[5:])
+			fmt.Printf("[sequence] F:%d S:%d V:%q\n", folder, seq, it.Value())
+
+		case db.KeyTypeNeed:
+			folder := binary.BigEndian.Uint32(key[1:])
+			file := string(key[5:])
+			fmt.Printf("[need] F:%d V:%q\n", folder, file)
+
+		case db.KeyTypeBlockList:
+			fmt.Printf("[blocklist] H:%x\n", key[1:])
+
+		case db.KeyTypeBlockListMap:
+			folder := binary.BigEndian.Uint32(key[1:])
+			hash := key[5:37]
+			fileName := string(key[37:])
+			fmt.Printf("[blocklistmap] F:%d H:%x N:%s\n", folder, hash, fileName)
+
+		case db.KeyTypeVersion:
+			fmt.Printf("[version] H:%x", key[1:])
+			var v protocol.Vector
+			err := v.Unmarshal(it.Value())
+			if err != nil {
+				fmt.Printf(" (invalid)\n")
+			} else {
+				fmt.Printf(" V:%v\n", v)
+			}
+
+		case db.KeyTypePendingFolder:
+			device := binary.BigEndian.Uint32(key[1:])
+			folder := string(key[5:])
+			var of db.ObservedFolder
+			of.Unmarshal(it.Value())
+			fmt.Printf("[pendingFolder] D:%d F:%s V:%v\n", device, folder, of)
+
+		case db.KeyTypePendingDevice:
+			device := "<invalid>"
+			dev, err := protocol.DeviceIDFromBytes(key[1:])
+			if err == nil {
+				device = dev.String()
+			}
+			var od db.ObservedDevice
+			od.Unmarshal(it.Value())
+			fmt.Printf("[pendingDevice] D:%v V:%v\n", device, od)
+
+		default:
+			fmt.Printf("[??? %d]\n  %x\n  %x\n", key[0], key, it.Value())
+		}
+	}
+	return nil
+}
--- a/cmd/syncthing/cli/index_dumpsize.go
+++ b/cmd/syncthing/cli/index_dumpsize.go
@@ -4,16 +4,16 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"container/heap"
 	"encoding/binary"
 	"fmt"
-	"log"
+
+	"github.com/urfave/cli"

 	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
 )

 type SizedElement struct {
@@ -39,13 +39,18 @@ func (h *ElementHeap) Pop() interface{} {
 	return x
 }

-func dumpsize(ldb backend.Backend) {
+func indexDumpSize(*cli.Context) error {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
 	h := &ElementHeap{}
 	heap.Init(h)

 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 	var ele SizedElement
 	for it.Next() {
@@ -96,4 +101,6 @@ func dumpsize(ldb backend.Backend) {
 		ele = heap.Pop(h).(SizedElement)
 		fmt.Println(ele.key, ele.size)
 	}
+
+	return nil
 }
--- a/cmd/syncthing/cli/index_idxck.go
+++ b/cmd/syncthing/cli/index_idxck.go
@@ -4,17 +4,18 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"bytes"
 	"encoding/binary"
+	"errors"
 	"fmt"
-	"log"
 	"sort"

+	"github.com/urfave/cli"
+
 	"github.com/syncthing/syncthing/lib/db"
-	"github.com/syncthing/syncthing/lib/db/backend"
 	"github.com/syncthing/syncthing/lib/protocol"
 )

@@ -34,7 +35,12 @@ type sequenceKey struct {
 	sequence uint64
 }

-func idxck(ldb backend.Backend) (success bool) {
+func indexCheck(*cli.Context) (err error) {
+	ldb, err := getDB()
+	if err != nil {
+		return err
+	}
+
 	folders := make(map[uint32]string)
 	devices := make(map[uint32]string)
 	deviceToIDs := make(map[string]uint32)
@@ -43,13 +49,24 @@ func idxck(ldb backend.Backend) (success bool) {
 	sequences := make(map[sequenceKey]string)
 	needs := make(map[globalKey]struct{})
 	blocklists := make(map[string]struct{})
+	versions := make(map[string]protocol.Vector)
 	usedBlocklists := make(map[string]struct{})
+	usedVersions := make(map[string]struct{})
 	var localDeviceKey uint32
-	success = true
+	success := true
+	defer func() {
+		if err == nil {
+			if success {
+				fmt.Println("Index check completed succesfully.")
+			} else {
+				err = errors.New("Inconsistencies found in the index")
+			}
+		}
+	}()

 	it, err := ldb.NewPrefixIterator(nil)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 	for it.Next() {
 		key := it.Key()
@@ -106,6 +123,16 @@ func idxck(ldb backend.Backend) (success bool) {
 		case db.KeyTypeBlockList:
 			hash := string(key[1:])
 			blocklists[hash] = struct{}{}
+
+		case db.KeyTypeVersion:
+			hash := string(key[1:])
+			var v protocol.Vector
+			if err := v.Unmarshal(it.Value()); err != nil {
+				fmt.Println("Unable to unmarshal Vector:", err)
+				success = false
+				continue
+			}
+			versions[hash] = v
 		}
 	}

@@ -157,6 +184,23 @@ func idxck(ldb backend.Backend) (success bool) {
 				usedBlocklists[key] = struct{}{}
 			}
 		}
+
+		if fi.VersionHash != nil {
+			key := string(fi.VersionHash)
+			if _, ok := versions[key]; !ok {
+				fmt.Printf("Missing version vector for file %q, version hash %x\n", fi.Name, fi.VersionHash)
+				success = false
+			} else {
+				usedVersions[key] = struct{}{}
+			}
+		}
+
+		_, ok := globals[globalKey{fk.folder, fk.name}]
+		if !ok {
+			fmt.Printf("Missing global for file %q\n", fi.Name)
+			success = false
+			continue
+		}
 	}

 	// Aggregate the ranges of missing sequence entries, print them
@@ -190,10 +234,10 @@ func idxck(ldb backend.Backend) (success bool) {
 			fmt.Printf("Unknown folder ID %d for VersionList %q\n", gk.folder, gk.name)
 			success = false
 		}
-		for i, fv := range vl.Versions {
-			dev, ok := deviceToIDs[string(fv.Device)]
+		checkGlobal := func(i int, device []byte, version protocol.Vector, invalid, deleted bool) {
+			dev, ok := deviceToIDs[string(device)]
 			if !ok {
-				fmt.Printf("VersionList %q, folder %q refers to unknown device %q\n", gk.name, folder, fv.Device)
+				fmt.Printf("VersionList %q, folder %q refers to unknown device %q\n", gk.name, folder, device)
 				success = false
 			}
 			fi, ok := fileInfos[fileInfoKey{gk.folder, dev, gk.name}]
@@ -201,14 +245,31 @@ func idxck(ldb backend.Backend) (success bool) {
 				fmt.Printf("VersionList %q, folder %q, entry %d refers to unknown FileInfo\n", gk.name, folder, i)
 				success = false
 			}
-			if !fi.Version.Equal(fv.Version) {
-				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo version mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, fv.Version, fi.Version)
+
+			fiv := fi.Version
+			if fi.VersionHash != nil {
+				fiv = versions[string(fi.VersionHash)]
+			}
+			if !fiv.Equal(version) {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo version mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, version, fi.Version)
 				success = false
 			}
-			if fi.IsInvalid() != fv.Invalid {
-				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo invalid mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, fv.Invalid, fi.IsInvalid())
+			if fi.IsInvalid() != invalid {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo invalid mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, invalid, fi.IsInvalid())
 				success = false
 			}
+			if fi.IsDeleted() != deleted {
+				fmt.Printf("VersionList %q, folder %q, entry %d, FileInfo deleted mismatch, %v (VersionList) != %v (FileInfo)\n", gk.name, folder, i, deleted, fi.IsDeleted())
+				success = false
+			}
+		}
+		for i, fv := range vl.RawVersions {
+			for _, device := range fv.Devices {
+				checkGlobal(i, device, fv.Version, false, fv.Deleted)
+			}
+			for _, device := range fv.InvalidDevices {
+				checkGlobal(i, device, fv.Version, true, fv.Deleted)
+			}
 		}

 		// If we need this file we should have a need entry for it. False
@@ -217,7 +278,9 @@ func idxck(ldb backend.Backend) (success bool) {
 		if needsLocally(vl) {
 			_, ok := needs[gk]
 			if !ok {
-				dev := deviceToIDs[string(vl.Versions[0].Device)]
+				fv, _ := vl.GetGlobal()
+				devB, _ := fv.FirstDevice()
+				dev := deviceToIDs[string(devB)]
 				fi := fileInfos[fileInfoKey{gk.folder, dev, gk.name}]
 				if !fi.IsDeleted() && !fi.IsIgnored() {
 					fmt.Printf("Missing need entry for needed file %q, folder %q\n", gk.name, folder)
@@ -277,20 +340,18 @@ func idxck(ldb backend.Backend) (success bool) {
 	if d := len(blocklists) - len(usedBlocklists); d > 0 {
 		fmt.Printf("%d block list entries out of %d needs GC\n", d, len(blocklists))
 	}
+	if d := len(versions) - len(usedVersions); d > 0 {
+		fmt.Printf("%d version entries out of %d needs GC\n", d, len(versions))
+	}

-	return
+	return nil
 }

 func needsLocally(vl db.VersionList) bool {
-	var lv *protocol.Vector
-	for _, fv := range vl.Versions {
-		if bytes.Equal(fv.Device, protocol.LocalDeviceID[:]) {
-			lv = &fv.Version
-			break
-		}
+	gfv, gok := vl.GetGlobal()
+	if !gok { // That's weird, but we hardly need something non-existant
+		return false
 	}
-	if lv == nil {
-		return true // proviosinally, it looks like we need the file
-	}
-	return !lv.GreaterEqual(vl.Versions[0].Version)
+	fv, ok := vl.Get(protocol.LocalDeviceID[:])
+	return db.Need(gfv, ok, fv.Version)
 }
--- a/cmd/syncthing/cli/main.go
+++ b/cmd/syncthing/cli/main.go
@@ -0,0 +1,160 @@
+// Copyright (C) 2019 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cli
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/alecthomas/kong"
+	"github.com/flynn-archive/go-shlex"
+	"github.com/pkg/errors"
+	"github.com/urfave/cli"
+
+	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
+	"github.com/syncthing/syncthing/lib/config"
+)
+
+type preCli struct {
+	GUIAddress string `name:"gui-address"`
+	GUIAPIKey  string `name:"gui-apikey"`
+	HomeDir    string `name:"home"`
+	ConfDir    string `name:"config"`
+	DataDir    string `name:"data"`
+}
+
+func Run() error {
+	// This is somewhat a hack around a chicken and egg problem. We need to set
+	// the home directory and potentially other flags to know where the
+	// syncthing instance is running in order to get it's config ... which we
+	// then use to construct the actual CLI ... at which point it's too late to
+	// add flags there...
+	c := preCli{}
+	parseFlags(&c)
+
+	// Not set as default above because the strings can be really long.
+	err := cmdutil.SetConfigDataLocationsFromFlags(c.HomeDir, c.ConfDir, c.DataDir)
+	if err != nil {
+		return errors.Wrap(err, "Command line options:")
+	}
+	clientFactory := &apiClientFactory{
+		cfg: config.GUIConfiguration{
+			RawAddress: c.GUIAddress,
+			APIKey:     c.GUIAPIKey,
+		},
+	}
+
+	configCommand, err := getConfigCommand(clientFactory)
+	if err != nil {
+		return err
+	}
+
+	// Implement the same flags at the upper CLI, but do nothing with them.
+	// This is so that the usage text is the same
+	fakeFlags := []cli.Flag{
+		cli.StringFlag{
+			Name:  "gui-address",
+			Value: "URL",
+			Usage: "Override GUI address (e.g. \"http://192.0.2.42:8443\")",
+		},
+		cli.StringFlag{
+			Name:  "gui-apikey",
+			Value: "API-KEY",
+			Usage: "Override GUI API key",
+		},
+		cli.StringFlag{
+			Name:  "home",
+			Value: "PATH",
+			Usage: "Set configuration and data directory",
+		},
+		cli.StringFlag{
+			Name:  "conf",
+			Value: "PATH",
+			Usage: "Set configuration directory (config and keys)",
+		},
+	}
+
+	// Construct the actual CLI
+	app := cli.NewApp()
+	app.Author = "The Syncthing Authors"
+	app.Metadata = map[string]interface{}{
+		"clientFactory": clientFactory,
+	}
+	app.Commands = []cli.Command{{
+		Name:  "cli",
+		Usage: "Syncthing command line interface",
+		Flags: fakeFlags,
+		Subcommands: []cli.Command{
+			configCommand,
+			showCommand,
+			operationCommand,
+			errorsCommand,
+			debugCommand,
+			{
+				Name:     "-",
+				HideHelp: true,
+				Usage:    "Read commands from stdin",
+				Action: func(ctx *cli.Context) error {
+					if ctx.NArg() > 0 {
+						return errors.New("command does not expect any arguments")
+					}
+
+					// Drop the `-` not to recurse into self.
+					args := make([]string, len(os.Args)-1)
+					copy(args, os.Args)
+
+					fmt.Println("Reading commands from stdin...", args)
+					scanner := bufio.NewScanner(os.Stdin)
+					for scanner.Scan() {
+						input, err := shlex.Split(scanner.Text())
+						if err != nil {
+							return errors.Wrap(err, "parsing input")
+						}
+						if len(input) == 0 {
+							continue
+						}
+						err = app.Run(append(args, input...))
+						if err != nil {
+							return err
+						}
+					}
+					return scanner.Err()
+				},
+			},
+		},
+	}}
+
+	return app.Run(os.Args)
+}
+
+func parseFlags(c *preCli) error {
+	// kong only needs to parse the global arguments after "cli" and before the
+	// subcommand (if any).
+	if len(os.Args) <= 2 {
+		return nil
+	}
+	args := os.Args[2:]
+	for i := 0; i < len(args); i++ {
+		if !strings.HasPrefix(args[i], "--") {
+			args = args[:i]
+			break
+		}
+		if !strings.Contains(args[i], "=") {
+			i++
+		}
+	}
+	// We don't want kong to print anything nor os.Exit (e.g. on -h)
+	parser, err := kong.New(c, kong.Writers(ioutil.Discard, ioutil.Discard), kong.Exit(func(int) {}))
+	if err != nil {
+		return err
+	}
+	_, err = parser.Parse(args)
+	return err
+}
--- a/cmd/syncthing/cli/operations.go
+++ b/cmd/syncthing/cli/operations.go
@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"fmt"
@@ -27,11 +27,6 @@ var operationCommand = cli.Command{
 			Usage:  "Shutdown syncthing",
 			Action: expects(0, emptyPost("system/shutdown")),
 		},
-		{
-			Name:   "reset",
-			Usage:  "Reset syncthing deleting all folders and devices",
-			Action: expects(0, emptyPost("system/reset")),
-		},
 		{
 			Name:   "upgrade",
 			Usage:  "Upgrade syncthing (if a newer version is available)",
@@ -39,7 +34,7 @@ var operationCommand = cli.Command{
 		},
 		{
 			Name:      "folder-override",
-			Usage:     "Override changes on folder (remote for sendonly, local for receiveonly)",
+			Usage:     "Override changes on folder (remote for sendonly, local for receiveonly). WARNING: Destructive - deletes/changes your data.",
 			ArgsUsage: "[folder id]",
 			Action:    expects(1, foldersOverride),
 		},
@@ -47,7 +42,10 @@ var operationCommand = cli.Command{
 }

 func foldersOverride(c *cli.Context) error {
-	client := c.App.Metadata["client"].(*APIClient)
+	client, err := getClientFactory(c).getClient()
+	if err != nil {
+		return err
+	}
 	cfg, err := getConfig(client)
 	if err != nil {
 		return err
--- a/cmd/syncthing/cli/show.go
+++ b/cmd/syncthing/cli/show.go
@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"github.com/urfave/cli"
@@ -18,27 +18,27 @@ var showCommand = cli.Command{
 		{
 			Name:   "version",
 			Usage:  "Show syncthing client version",
-			Action: expects(0, dumpOutput("system/version")),
+			Action: expects(0, indexDumpOutput("system/version")),
 		},
 		{
 			Name:   "config-status",
 			Usage:  "Show configuration status, whether or not a restart is required for changes to take effect",
-			Action: expects(0, dumpOutput("system/config/insync")),
+			Action: expects(0, indexDumpOutput("config/restart-required")),
 		},
 		{
 			Name:   "system",
 			Usage:  "Show system status",
-			Action: expects(0, dumpOutput("system/status")),
+			Action: expects(0, indexDumpOutput("system/status")),
 		},
 		{
 			Name:   "connections",
 			Usage:  "Report about connections to other devices",
-			Action: expects(0, dumpOutput("system/connections")),
+			Action: expects(0, indexDumpOutput("system/connections")),
 		},
 		{
 			Name:   "usage",
 			Usage:  "Show usage report",
-			Action: expects(0, dumpOutput("svc/report")),
+			Action: expects(0, indexDumpOutput("svc/report")),
 		},
 	},
 }
--- a/cmd/syncthing/cli/utils.go
+++ b/cmd/syncthing/cli/utils.go
@@ -4,16 +4,21 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-package main
+package cli

 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
+	"mime"
 	"net/http"
 	"os"
+	"path/filepath"

 	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/db/backend"
+	"github.com/syncthing/syncthing/lib/locations"
 	"github.com/urfave/cli"
 )

@@ -27,16 +32,25 @@ func responseToBArray(response *http.Response) ([]byte, error) {

 func emptyPost(url string) cli.ActionFunc {
 	return func(c *cli.Context) error {
-		client := c.App.Metadata["client"].(*APIClient)
-		_, err := client.Post(url, "")
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
+		_, err = client.Post(url, "")
 		return err
 	}
 }

-func dumpOutput(url string) cli.ActionFunc {
+func indexDumpOutput(url string) cli.ActionFunc {
 	return func(c *cli.Context) error {
-		client := c.App.Metadata["client"].(*APIClient)
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
 		response, err := client.Get(url)
+		if errors.Is(err, errNotFound) {
+			return errors.New("not found (folder/file not in database)")
+		}
 		if err != nil {
 			return err
 		}
@@ -44,7 +58,43 @@ func dumpOutput(url string) cli.ActionFunc {
 	}
 }

-func getConfig(c *APIClient) (config.Configuration, error) {
+func saveToFile(url string) cli.ActionFunc {
+	return func(c *cli.Context) error {
+		client, err := getClientFactory(c).getClient()
+		if err != nil {
+			return err
+		}
+		response, err := client.Get(url)
+		if err != nil {
+			return err
+		}
+		_, params, err := mime.ParseMediaType(response.Header.Get("Content-Disposition"))
+		if err != nil {
+			return err
+		}
+		filename := params["filename"]
+		if filename == "" {
+			return errors.New("Missing filename in response")
+		}
+		bs, err := responseToBArray(response)
+		if err != nil {
+			return err
+		}
+		f, err := os.Create(filename)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		_, err = f.Write(bs)
+		if err != nil {
+			return err
+		}
+		fmt.Println("Wrote results to", filename)
+		return err
+	}
+}
+
+func getConfig(c APIClient) (config.Configuration, error) {
 	cfg := config.Configuration{}
 	response, err := c.Get("system/config")
 	if err != nil {
@@ -92,3 +142,24 @@ func prettyPrintResponse(c *cli.Context, response *http.Response) error {
 	// TODO: Check flag for pretty print format
 	return prettyPrintJSON(data)
 }
+
+func getDB() (backend.Backend, error) {
+	return backend.OpenLevelDBRO(locations.Get(locations.Database))
+}
+
+func nulString(bs []byte) string {
+	for i := range bs {
+		if bs[i] == 0 {
+			return string(bs[:i])
+		}
+	}
+	return string(bs)
+}
+
+func normalizePath(path string) string {
+	return filepath.ToSlash(filepath.Clean(path))
+}
+
+func getClientFactory(c *cli.Context) *apiClientFactory {
+	return c.App.Metadata["clientFactory"].(*apiClientFactory)
+}
--- a/cmd/syncthing/cmdutil/util.go
+++ b/cmd/syncthing/cmdutil/util.go
@@ -0,0 +1,35 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmdutil
+
+import (
+	"errors"
+
+	"github.com/syncthing/syncthing/lib/locations"
+)
+
+func SetConfigDataLocationsFromFlags(homeDir, confDir, dataDir string) error {
+	homeSet := homeDir != ""
+	confSet := confDir != ""
+	dataSet := dataDir != ""
+	switch {
+	case dataSet != confSet:
+		return errors.New("either both or none of -conf and -data must be given, use -home to set both at once")
+	case homeSet && dataSet:
+		return errors.New("-home must not be used together with -conf and -data")
+	case homeSet:
+		confDir = homeDir
+		dataDir = homeDir
+		fallthrough
+	case dataSet:
+		if err := locations.SetBaseDir(locations.ConfigBaseDir, confDir); err != nil {
+			return err
+		}
+		return locations.SetBaseDir(locations.DataBaseDir, dataDir)
+	}
+	return nil
+}
--- a/cmd/syncthing/decrypt/decrypt.go
+++ b/cmd/syncthing/decrypt/decrypt.go
@@ -0,0 +1,275 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+// Package decrypt implements the `syncthing decrypt` subcommand.
+package decrypt
+
+import (
+	"encoding/binary"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"path/filepath"
+
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/fs"
+	"github.com/syncthing/syncthing/lib/osutil"
+	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/scanner"
+)
+
+type CLI struct {
+	Path       string `arg:"" required:"1" help:"Path to encrypted folder"`
+	To         string `xor:"mode" placeholder:"PATH" help:"Destination directory, when decrypting"`
+	VerifyOnly bool   `xor:"mode" help:"Don't write decrypted files to disk (but verify plaintext hashes)"`
+	Password   string `help:"Folder password for decryption / verification" env:"FOLDER_PASSWORD"`
+	FolderID   string `help:"Folder ID of the encrypted folder, if it cannot be determined automatically"`
+	Continue   bool   `help:"Continue processing next file in case of error, instead of aborting"`
+	Verbose    bool   `help:"Show verbose progress information"`
+	TokenPath  string `placeholder:"PATH" help:"Path to the token file within the folder (used to determine folder ID)"`
+
+	folderKey *[32]byte
+}
+
+type storedEncryptionToken struct {
+	FolderID string
+	Token    []byte
+}
+
+func (c *CLI) Run() error {
+	log.SetFlags(0)
+
+	if c.To == "" && !c.VerifyOnly {
+		return fmt.Errorf("must set --to or --verify")
+	}
+
+	if c.TokenPath == "" {
+		// This is a bit long to show as default in --help
+		c.TokenPath = filepath.Join(config.DefaultMarkerName, config.EncryptionTokenName)
+	}
+
+	if c.FolderID == "" {
+		// We should try to figure out the folder ID
+		folderID, err := c.getFolderID()
+		if err != nil {
+			log.Println("No --folder-id given and couldn't read folder token")
+			return fmt.Errorf("getting folder ID: %w", err)
+		}
+
+		c.FolderID = folderID
+		if c.Verbose {
+			log.Println("Found folder ID:", c.FolderID)
+		}
+	}
+
+	c.folderKey = protocol.KeyFromPassword(c.FolderID, c.Password)
+
+	return c.walk()
+}
+
+// walk finds and processes every file in the encrypted folder
+func (c *CLI) walk() error {
+	srcFs := fs.NewFilesystem(fs.FilesystemTypeBasic, c.Path)
+	var dstFs fs.Filesystem
+	if c.To != "" {
+		dstFs = fs.NewFilesystem(fs.FilesystemTypeBasic, c.To)
+	}
+
+	return srcFs.Walk(".", func(path string, info fs.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if !info.IsRegular() {
+			return nil
+		}
+		if fs.IsInternal(path) {
+			return nil
+		}
+
+		return c.withContinue(c.process(srcFs, dstFs, path))
+	})
+}
+
+// If --continue was set we just mention the error and return nil to
+// continue processing.
+func (c *CLI) withContinue(err error) error {
+	if err == nil {
+		return nil
+	}
+	if c.Continue {
+		log.Println("Warning:", err)
+		return nil
+	}
+	return err
+}
+
+// getFolderID returns the folder ID found in the encrypted token, or an
+// error.
+func (c *CLI) getFolderID() (string, error) {
+	tokenPath := filepath.Join(c.Path, c.TokenPath)
+	bs, err := ioutil.ReadFile(tokenPath)
+	if err != nil {
+		return "", fmt.Errorf("reading folder token: %w", err)
+	}
+
+	var tok storedEncryptionToken
+	if err := json.Unmarshal(bs, &tok); err != nil {
+		return "", fmt.Errorf("parsing folder token: %w", err)
+	}
+
+	return tok.FolderID, nil
+}
+
+// process handles the file named path in srcFs, decrypting it into dstFs
+// unless dstFs is nil.
+func (c *CLI) process(srcFs fs.Filesystem, dstFs fs.Filesystem, path string) error {
+	if c.Verbose {
+		log.Printf("Processing %q", path)
+	}
+
+	encFd, err := srcFs.Open(path)
+	if err != nil {
+		return err
+	}
+	defer encFd.Close()
+
+	encFi, err := c.loadEncryptedFileInfo(encFd)
+	if err != nil {
+		return fmt.Errorf("%s: loading metadata trailer: %w", path, err)
+	}
+
+	// Workaround for a bug in <= v1.15.0-rc.5 where we stored names
+	// in native format, while protocol expects wire format (slashes).
+	encFi.Name = osutil.NormalizedFilename(encFi.Name)
+
+	plainFi, err := protocol.DecryptFileInfo(*encFi, c.folderKey)
+	if err != nil {
+		return fmt.Errorf("%s: decrypting metadata: %w", path, err)
+	}
+
+	if c.Verbose {
+		log.Printf("Plaintext filename is %q", plainFi.Name)
+	}
+
+	var plainFd fs.File
+	if dstFs != nil {
+		if err := dstFs.MkdirAll(filepath.Dir(plainFi.Name), 0700); err != nil {
+			return fmt.Errorf("%s: %w", plainFi.Name, err)
+		}
+
+		plainFd, err = dstFs.Create(plainFi.Name)
+		if err != nil {
+			return fmt.Errorf("%s: %w", plainFi.Name, err)
+		}
+		defer plainFd.Close() // also closed explicitly in the return
+	}
+
+	if err := c.decryptFile(encFi, &plainFi, encFd, plainFd); err != nil {
+		// Decrypting the file failed, leaving it in an inconsistent state.
+		// Delete it. Even --continue currently doesn't mean "leave broken
+		// stuff in place", it just means "try the next file instead of
+		// aborting".
+		if plainFd != nil {
+			_ = dstFs.Remove(plainFd.Name())
+		}
+		return fmt.Errorf("%s: %s: %w", path, plainFi.Name, err)
+	} else if c.Verbose {
+		log.Printf("Data verified for %q", plainFi.Name)
+	}
+
+	if plainFd != nil {
+		return plainFd.Close()
+	}
+	return nil
+}
+
+// decryptFile reads, decrypts and verifies all the blocks in src, writing
+// it to dst if dst is non-nil. (If dst is nil it just becomes a
+// read-and-verify operation.)
+func (c *CLI) decryptFile(encFi *protocol.FileInfo, plainFi *protocol.FileInfo, src io.ReaderAt, dst io.WriterAt) error {
+	// The encrypted and plaintext files must consist of an equal number of blocks
+	if len(encFi.Blocks) != len(plainFi.Blocks) {
+		return fmt.Errorf("block count mismatch: encrypted %d != plaintext %d", len(encFi.Blocks), len(plainFi.Blocks))
+	}
+
+	fileKey := protocol.FileKey(plainFi.Name, c.folderKey)
+	for i, encBlock := range encFi.Blocks {
+		// Read the encrypted block
+		buf := make([]byte, encBlock.Size)
+		if _, err := src.ReadAt(buf, encBlock.Offset); err != nil {
+			return fmt.Errorf("encrypted block %d (%d bytes): %w", i, encBlock.Size, err)
+		}
+
+		// Decrypt it
+		dec, err := protocol.DecryptBytes(buf, fileKey)
+		if err != nil {
+			return fmt.Errorf("encrypted block %d (%d bytes): %w", i, encBlock.Size, err)
+		}
+
+		// Verify the block size against the expected plaintext
+		plainBlock := plainFi.Blocks[i]
+		if i == len(plainFi.Blocks)-1 && len(dec) > plainBlock.Size {
+			// The last block might be padded, which is fine (we skip the padding)
+			dec = dec[:plainBlock.Size]
+		} else if len(dec) != plainBlock.Size {
+			return fmt.Errorf("plaintext block %d size mismatch, actual %d != expected %d", i, len(dec), plainBlock.Size)
+		}
+
+		// Verify the hash against the plaintext block info
+		if !scanner.Validate(dec, plainBlock.Hash, 0) {
+			// The block decrypted correctly but fails the hash check. This
+			// is odd and unexpected, but it it's still a valid block from
+			// the source. The file might have changed while we pulled it?
+			err := fmt.Errorf("plaintext block %d (%d bytes) failed validation after decryption", i, plainBlock.Size)
+			if c.Continue {
+				log.Printf("Warning: %s: %s: %v", encFi.Name, plainFi.Name, err)
+			} else {
+				return err
+			}
+		}
+
+		// Write it to the destination, unless we're just verifying.
+		if dst != nil {
+			if _, err := dst.WriteAt(dec, plainBlock.Offset); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// loadEncryptedFileInfo loads the encrypted FileInfo trailer from a file on
+// disk.
+func (c *CLI) loadEncryptedFileInfo(fd fs.File) (*protocol.FileInfo, error) {
+	// Seek to the size of the trailer block
+	if _, err := fd.Seek(-4, io.SeekEnd); err != nil {
+		return nil, err
+	}
+	var bs [4]byte
+	if _, err := io.ReadFull(fd, bs[:]); err != nil {
+		return nil, err
+	}
+	size := int64(binary.BigEndian.Uint32(bs[:]))
+
+	// Seek to the start of the trailer
+	if _, err := fd.Seek(-(4 + size), io.SeekEnd); err != nil {
+		return nil, err
+	}
+	trailer := make([]byte, size)
+	if _, err := io.ReadFull(fd, trailer); err != nil {
+		return nil, err
+	}
+
+	var encFi protocol.FileInfo
+	if err := encFi.Unmarshal(trailer); err != nil {
+		return nil, err
+	}
+
+	return &encFi, nil
+}
--- a/cmd/syncthing/heapprof.go
+++ b/cmd/syncthing/heapprof.go
@@ -11,24 +11,17 @@ import (
 	"os"
 	"runtime"
 	"runtime/pprof"
-	"strconv"
 	"syscall"
 	"time"
 )

-func init() {
-	if innerProcess && os.Getenv("STHEAPPROFILE") != "" {
-		rate := 1
-		if i, err := strconv.Atoi(os.Getenv("STHEAPPROFILE")); err == nil {
-			rate = i
-		}
-		l.Debugln("Starting heap profiling")
-		go func() {
-			err := saveHeapProfiles(rate) // Only returns on error
-			l.Warnln("Heap profiler failed:", err)
-			panic("Heap profiler failed")
-		}()
-	}
+func startHeapProfiler() {
+	l.Debugln("Starting heap profiling")
+	go func() {
+		err := saveHeapProfiles(1) // Only returns on error
+		l.Warnln("Heap profiler failed:", err)
+		panic("Heap profiler failed")
+	}()
 }

 func saveHeapProfiles(rate int) error {
--- a/cmd/syncthing/main.go
+++ b/cmd/syncthing/main.go
--- a/cmd/syncthing/monitor.go
+++ b/cmd/syncthing/monitor.go
@@ -25,8 +25,8 @@ import (
 	"github.com/syncthing/syncthing/lib/locations"
 	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/svcutil"
 	"github.com/syncthing/syncthing/lib/sync"
-	"github.com/syncthing/syncthing/lib/syncthing"
 )

 var (
@@ -36,20 +36,21 @@ var (
 )

 const (
-	countRestarts         = 4
-	loopThreshold         = 60 * time.Second
+	restartCounts         = 4
+	restartPause          = 1 * time.Second
+	restartLoopThreshold  = 60 * time.Second
 	logFileAutoCloseDelay = 5 * time.Second
 	logFileMaxOpenTime    = time.Minute
 	panicUploadMaxWait    = 30 * time.Second
 	panicUploadNoticeWait = 10 * time.Second
 )

-func monitorMain(runtimeOptions RuntimeOptions) {
+func monitorMain(options serveOptions) {
 	l.SetPrefix("[monitor] ")

 	var dst io.Writer = os.Stdout

-	logFile := runtimeOptions.logFile
+	logFile := options.LogFile
 	if logFile != "-" {
 		if expanded, err := fs.ExpandTilde(logFile); err == nil {
 			logFile = expanded
@@ -59,8 +60,8 @@ func monitorMain(runtimeOptions RuntimeOptions) {
 		open := func(name string) (io.WriteCloser, error) {
 			return newAutoclosedFile(name, logFileAutoCloseDelay, logFileMaxOpenTime)
 		}
-		if runtimeOptions.logMaxSize > 0 {
-			fileDst, err = newRotatedFile(logFile, open, int64(runtimeOptions.logMaxSize), runtimeOptions.logMaxFiles)
+		if options.LogMaxSize > 0 {
+			fileDst, err = newRotatedFile(logFile, open, int64(options.LogMaxSize), options.LogMaxFiles)
 		} else {
 			fileDst, err = open(logFile)
 		}
@@ -84,7 +85,7 @@ func monitorMain(runtimeOptions RuntimeOptions) {
 	}

 	args := os.Args
-	var restarts [countRestarts]time.Time
+	var restarts [restartCounts]time.Time

 	stopSign := make(chan os.Signal, 1)
 	signal.Notify(stopSign, os.Interrupt, sigTerm)
@@ -97,9 +98,9 @@ func monitorMain(runtimeOptions RuntimeOptions) {
 	for {
 		maybeReportPanics()

-		if t := time.Since(restarts[0]); t < loopThreshold {
-			l.Warnf("%d restarts in %v; not retrying further", countRestarts, t)
-			os.Exit(syncthing.ExitError.AsInt())
+		if t := time.Since(restarts[0]); t < restartLoopThreshold {
+			l.Warnf("%d restarts in %v; not retrying further", restartCounts, t)
+			os.Exit(svcutil.ExitError.AsInt())
 		}

 		copy(restarts[0:], restarts[1:])
@@ -169,15 +170,15 @@ func monitorMain(runtimeOptions RuntimeOptions) {

 		if err == nil {
 			// Successful exit indicates an intentional shutdown
-			os.Exit(syncthing.ExitSuccess.AsInt())
+			os.Exit(svcutil.ExitSuccess.AsInt())
 		}

 		if exiterr, ok := err.(*exec.ExitError); ok {
 			exitCode := exiterr.ExitCode()
-			if stopped || runtimeOptions.noRestart {
+			if stopped || options.NoRestart {
 				os.Exit(exitCode)
 			}
-			if exitCode == syncthing.ExitUpgrade.AsInt() {
+			if exitCode == svcutil.ExitUpgrade.AsInt() {
 				// Restart the monitor process to release the .old
 				// binary as part of the upgrade process.
 				l.Infoln("Restarting monitor...")
@@ -188,12 +189,12 @@ func monitorMain(runtimeOptions RuntimeOptions) {
 			}
 		}

-		if runtimeOptions.noRestart {
-			os.Exit(syncthing.ExitError.AsInt())
+		if options.NoRestart {
+			os.Exit(svcutil.ExitError.AsInt())
 		}

 		l.Infoln("Syncthing exited:", err)
-		time.Sleep(1 * time.Second)
+		time.Sleep(restartPause)

 		if first {
 			// Let the next child process know that this is not the first time
@@ -311,6 +312,11 @@ func copyStdout(stdout io.Reader, dst io.Writer) {
 }

 func restartMonitor(args []string) error {
+	// Set the STRESTART environment variable to indicate to the next
+	// process that this is a restart and not initial start. This prevents
+	// opening the browser on startup.
+	os.Setenv("STRESTART", "yes")
+
 	if runtime.GOOS != "windows" {
 		// syscall.Exec is the cleanest way to restart on Unixes as it
 		// replaces the current process with the new one, keeping the pid and
@@ -558,7 +564,7 @@ func childEnv() []string {
 // panicUploadMaxWait uploading panics...
 func maybeReportPanics() {
 	// Try to get a config to see if/where panics should be reported.
-	cfg, err := loadOrDefaultConfig(protocol.EmptyDeviceID, events.NoopLogger)
+	cfg, err := loadOrDefaultConfig(protocol.EmptyDeviceID, events.NoopLogger, true)
 	if err != nil {
 		l.Warnln("Couldn't load config; not reporting crash")
 		return
--- a/cmd/syncthing/openurl_unix.go
+++ b/cmd/syncthing/openurl_unix.go
@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

+//go:build !windows
 // +build !windows

 package main
--- a/cmd/syncthing/openurl_windows.go
+++ b/cmd/syncthing/openurl_windows.go
@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

+//go:build windows
 // +build windows

 package main
--- a/cmd/syncthing/options_others.go
+++ b/cmd/syncthing/options_others.go
@@ -1,10 +1,14 @@
-// Copyright (C) 2016 The Syncthing Authors.
+// Copyright (C) 2021 The Syncthing Authors.
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-// The existence of this file means we get 0% test coverage rather than no
-// test coverage at all. Remove when implementing an actual test.
+//go:build !windows
+// +build !windows

-package stats
+package main
+
+type buildServeOptions struct {
+	HideConsole bool `hidden:""`
+}
--- a/cmd/syncthing/options_windows.go
+++ b/cmd/syncthing/options_windows.go
@@ -0,0 +1,11 @@
+// Copyright (C) 2021 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+type buildServeOptions struct {
+	HideConsole bool `name:"no-console" help:"Hide console window"`
+}
--- a/cmd/syncthing/perfstats_unix.go
+++ b/cmd/syncthing/perfstats_unix.go
@@ -4,6 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

+//go:build !solaris && !windows
 // +build !solaris,!windows

 package main
@@ -18,10 +19,8 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )

-func init() {
-	if innerProcess && os.Getenv("STPERFSTATS") != "" {
-		go savePerfStats(fmt.Sprintf("perfstats-%d.csv", syscall.Getpid()))
-	}
+func startPerfStats() {
+	go savePerfStats(fmt.Sprintf("perfstats-%d.csv", syscall.Getpid()))
 }

 func savePerfStats(file string) {
--- a/cmd/syncthing/perfstats_unsupported.go
+++ b/cmd/syncthing/perfstats_unsupported.go
@@ -1,13 +1,13 @@
-// Copyright (C) 2017 The Syncthing Authors.
+// Copyright (C) 2021 The Syncthing Authors.
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-//+build noupgrade
+//go:build solaris || windows
+// +build solaris windows

-package build
+package main

-func init() {
-	Tags = append(Tags, "noupgrade")
+func startPerfStats() {
 }
--- a/cmd/syncthing/traceback.go
+++ b/cmd/syncthing/traceback.go
@@ -4,7 +4,8 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at https://mozilla.org/MPL/2.0/.

-//+build go1.7
+//go:build go1.7
+// +build go1.7

 package main

--- a/cmd/syncthing/usage.go
+++ b/cmd/syncthing/usage.go
@@ -1,57 +0,0 @@
-// Copyright (C) 2014 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package main
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"io"
-	"text/tabwriter"
-)
-
-func optionTable(w io.Writer, rows [][]string) {
-	tw := tabwriter.NewWriter(w, 2, 4, 2, ' ', 0)
-	for _, row := range rows {
-		for i, cell := range row {
-			if i > 0 {
-				tw.Write([]byte("\t"))
-			}
-			tw.Write([]byte(cell))
-		}
-		tw.Write([]byte("\n"))
-	}
-	tw.Flush()
-}
-
-func usageFor(fs *flag.FlagSet, usage string, extra string) func() {
-	return func() {
-		var b bytes.Buffer
-		b.WriteString("Usage:\n  " + usage + "\n")
-
-		var options [][]string
-		fs.VisitAll(func(f *flag.Flag) {
-			var opt = "  -" + f.Name
-
-			if f.DefValue != "false" {
-				opt += "=" + fmt.Sprintf(`"%s"`, f.DefValue)
-			}
-			options = append(options, []string{opt, f.Usage})
-		})
-
-		if len(options) > 0 {
-			b.WriteString("\nOptions:\n")
-			optionTable(&b, options)
-		}
-
-		fmt.Println(b.String())
-
-		if len(extra) > 0 {
-			fmt.Println(extra)
-		}
-	}
-}
--- a/cmd/uraggregate/main.go
+++ b/cmd/uraggregate/main.go
@@ -47,32 +47,32 @@ func main() {
 func runAggregation(db *sql.DB) {
 	since := maxIndexedDay(db, "VersionSummary")
 	log.Println("Aggregating VersionSummary data since", since)
-	rows, err := aggregateVersionSummary(db, since)
+	rows, err := aggregateVersionSummary(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")

 	log.Println("Aggregating UserMovement data")
 	rows, err = aggregateUserMovement(db)
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")

-	log.Println("Aggregating Performance data")
 	since = maxIndexedDay(db, "Performance")
-	rows, err = aggregatePerformance(db, since)
+	log.Println("Aggregating Performance data since", since)
+	rows, err = aggregatePerformance(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")

-	log.Println("Aggregating BlockStats data")
 	since = maxIndexedDay(db, "BlockStats")
-	rows, err = aggregateBlockStats(db, since)
+	log.Println("Aggregating BlockStats data since", since)
+	rows, err = aggregateBlockStats(db, since.Add(24*time.Hour))
 	if err != nil {
-		log.Fatalln("aggregate:", err)
+		log.Println("aggregate:", err)
 	}
 	log.Println("Inserted", rows, "rows")
 }
@@ -135,35 +135,35 @@ func setupDB(db *sql.DB) error {

 	row := db.QueryRow(`SELECT 'UniqueDayVersionIndex'::regclass`)
 	if err := row.Scan(&t); err != nil {
-		_, err = db.Exec(`CREATE UNIQUE INDEX UniqueDayVersionIndex ON VersionSummary (Day, Version)`)
+		_, _ = db.Exec(`CREATE UNIQUE INDEX UniqueDayVersionIndex ON VersionSummary (Day, Version)`)
 	}

 	row = db.QueryRow(`SELECT 'VersionDayIndex'::regclass`)
 	if err := row.Scan(&t); err != nil {
-		_, err = db.Exec(`CREATE INDEX VersionDayIndex ON VersionSummary (Day)`)
+		_, _ = db.Exec(`CREATE INDEX VersionDayIndex ON VersionSummary (Day)`)
 	}

 	row = db.QueryRow(`SELECT 'MovementDayIndex'::regclass`)
 	if err := row.Scan(&t); err != nil {
-		_, err = db.Exec(`CREATE INDEX MovementDayIndex ON UserMovement (Day)`)
+		_, _ = db.Exec(`CREATE INDEX MovementDayIndex ON UserMovement (Day)`)
 	}

 	row = db.QueryRow(`SELECT 'PerformanceDayIndex'::regclass`)
 	if err := row.Scan(&t); err != nil {
-		_, err = db.Exec(`CREATE INDEX PerformanceDayIndex ON Performance (Day)`)
+		_, _ = db.Exec(`CREATE INDEX PerformanceDayIndex ON Performance (Day)`)
 	}

 	row = db.QueryRow(`SELECT 'BlockStatsDayIndex'::regclass`)
 	if err := row.Scan(&t); err != nil {
-		_, err = db.Exec(`CREATE INDEX BlockStatsDayIndex ON BlockStats (Day)`)
+		_, _ = db.Exec(`CREATE INDEX BlockStatsDayIndex ON BlockStats (Day)`)
 	}

-	return err
+	return nil
 }

 func maxIndexedDay(db *sql.DB, table string) time.Time {
 	var t time.Time
-	row := db.QueryRow("SELECT MAX(Day) FROM " + table)
+	row := db.QueryRow("SELECT MAX(DATE_TRUNC('day', Day)) FROM " + table)
 	err := row.Scan(&t)
 	if err != nil {
 		return time.Time{}
@@ -175,13 +175,13 @@ func aggregateVersionSummary(db *sql.DB, since time.Time) (int64, error) {
 	res, err := db.Exec(`INSERT INTO VersionSummary (
 	SELECT
 		DATE_TRUNC('day', Received) AS Day,
-		SUBSTRING(Version FROM '^v\d.\d+') AS Ver,
+		SUBSTRING(Report->>'version' FROM '^v\d.\d+') AS Ver,
 		COUNT(*) AS Count
-		FROM Reports
+		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
-			AND Version like 'v_.%'
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
+			AND Report->>'version' like 'v_.%'
 		GROUP BY Day, Ver
 		);
 	`, since)
@@ -195,11 +195,12 @@ func aggregateVersionSummary(db *sql.DB, since time.Time) (int64, error) {
 func aggregateUserMovement(db *sql.DB) (int64, error) {
 	rows, err := db.Query(`SELECT
 		DATE_TRUNC('day', Received) AS Day,
-		UniqueID
-		FROM Reports
+		Report->>'uniqueID'
+		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
-			AND Version like 'v_.%'
+			Report->>'uniqueID' IS NOT NULL
+			AND Received < DATE_TRUNC('day', NOW())
+			AND Report->>'version' like 'v_.%'
 		ORDER BY Day
 	`)
 	if err != nil {
@@ -276,16 +277,18 @@ func aggregatePerformance(db *sql.DB, since time.Time) (int64, error) {
 	res, err := db.Exec(`INSERT INTO Performance (
 	SELECT
 		DATE_TRUNC('day', Received) AS Day,
-		AVG(TotFiles) As TotFiles,
-		AVG(TotMiB) As TotMiB,
-		AVG(SHA256Perf) As SHA256Perf,
-		AVG(MemorySize) As MemorySize,
-		AVG(MemoryUsageMiB) As MemoryUsageMiB
-		FROM Reports
+		AVG((Report->>'totFiles')::numeric) As TotFiles,
+		AVG((Report->>'totMiB')::numeric) As TotMiB,
+		AVG((Report->>'sha256Perf')::numeric) As SHA256Perf,
+		AVG((Report->>'memorySize')::numeric) As MemorySize,
+		AVG((Report->>'memoryUsageMiB')::numeric) As MemoryUsageMiB
+		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
-			AND Version like 'v_.%'
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
+			AND Report->>'version' like 'v_.%'
+			/* Some custom implementation reported bytes when we expect megabytes, cap at petabyte */
+			AND (Report->>'memorySize')::numeric < 1073741824
 		GROUP BY Day
 		);
 	`, since)
@@ -303,22 +306,22 @@ func aggregateBlockStats(db *sql.DB, since time.Time) (int64, error) {
 	SELECT
 		DATE_TRUNC('day', Received) AS Day,
 		COUNT(1) As Reports,
-		SUM(BlocksTotal) AS Total,
-		SUM(BlocksRenamed) AS Renamed,
-		SUM(BlocksReused) AS Reused,
-		SUM(BlocksPulled) AS Pulled,
-		SUM(BlocksCopyOrigin) AS CopyOrigin,
-		SUM(BlocksCopyOriginShifted) AS CopyOriginShifted,
-		SUM(BlocksCopyElsewhere) AS CopyElsewhere
-		FROM Reports
+		SUM((Report->'blockStats'->>'total')::numeric) AS Total,
+		SUM((Report->'blockStats'->>'renamed')::numeric) AS Renamed,
+		SUM((Report->'blockStats'->>'reused')::numeric) AS Reused,
+		SUM((Report->'blockStats'->>'pulled')::numeric) AS Pulled,
+		SUM((Report->'blockStats'->>'copyOrigin')::numeric) AS CopyOrigin,
+		SUM((Report->'blockStats'->>'copyOriginShifted')::numeric) AS CopyOriginShifted,
+		SUM((Report->'blockStats'->>'copyElsewhere')::numeric) AS CopyElsewhere
+		FROM ReportsJson
 		WHERE
-			DATE_TRUNC('day', Received) > $1
-			AND DATE_TRUNC('day', Received) < DATE_TRUNC('day', NOW())
-			AND ReportVersion = 3
-			AND Version like 'v_.%'
-			AND Version NOT LIKE 'v0.14.40%'
-			AND Version NOT LIKE 'v0.14.39%'
-			AND Version NOT LIKE 'v0.14.38%'
+			Received > $1
+			AND Received < DATE_TRUNC('day', NOW())
+			AND (Report->>'urVersion')::numeric >= 3
+			AND Report->>'version' like 'v_.%'
+			AND Report->>'version' NOT LIKE 'v0.14.40%'
+			AND Report->>'version' NOT LIKE 'v0.14.39%'
+			AND Report->>'version' NOT LIKE 'v0.14.38%'
 		GROUP BY Day
 	);
 	`, since)
--- a/cmd/ursrv/analytics.go
+++ b/cmd/ursrv/analytics.go
@@ -114,6 +114,23 @@ func statsForInts(data []int) [4]float64 {
 	return res
 }

+func statsForInt64s(data []int64) [4]float64 {
+	var res [4]float64
+	if len(data) == 0 {
+		return res
+	}
+
+	sort.Slice(data, func(a, b int) bool {
+		return data[a] < data[b]
+	})
+
+	res[0] = float64(data[int(float64(len(data))*0.05)])
+	res[1] = float64(data[len(data)/2])
+	res[2] = float64(data[int(float64(len(data))*0.95)])
+	res[3] = float64(data[len(data)-1])
+	return res
+}
+
 func statsForFloats(data []float64) [4]float64 {
 	var res [4]float64
 	if len(data) == 0 {
--- a/cmd/ursrv/main.go
+++ b/cmd/ursrv/main.go
@@ -10,10 +10,7 @@ import (
 	"bytes"
 	"crypto/tls"
 	"database/sql"
-	"database/sql/driver"
 	"encoding/json"
-	"errors"
-	"fmt"
 	"html/template"
 	"io"
 	"io/ioutil"
@@ -23,13 +20,16 @@ import (
 	"os"
 	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 	"unicode"

-	"github.com/lib/pq"
-	geoip2 "github.com/oschwald/geoip2-golang"
+	"github.com/oschwald/geoip2-golang"
+
+	"github.com/syncthing/syncthing/lib/upgrade"
+	"github.com/syncthing/syncthing/lib/ur/contract"
 )

 var (
@@ -55,7 +55,7 @@ var (
 		{regexp.MustCompile("jenkins@build.syncthing.net"), "GitHub"},
 		{regexp.MustCompile("snap@build.syncthing.net"), "Snapcraft"},
 		{regexp.MustCompile("android-.*vagrant@basebox-stretch64"), "F-Droid"},
-		{regexp.MustCompile("builduser@svetlemodry"), "Arch (3rd party)"},
+		{regexp.MustCompile("builduser@(archlinux|svetlemodry)"), "Arch (3rd party)"},
 		{regexp.MustCompile("synology@kastelo.net"), "Synology (Kastelo)"},
 		{regexp.MustCompile("@debian"), "Debian (3rd party)"},
 		{regexp.MustCompile("@fedora"), "Fedora (3rd party)"},
@@ -89,7 +89,7 @@ var funcs = map[string]interface{}{
 			parts = append(parts, part)
 		}
 		if len(input) > 0 {
-			parts = append(parts, input[:])
+			parts = append(parts, input)
 		}
 		return parts[whichPart-1]
 	},
@@ -102,585 +102,44 @@ func getEnvDefault(key, def string) string {
 	return def
 }

-type IntMap map[string]int
-
-func (p IntMap) Value() (driver.Value, error) {
-	return json.Marshal(p)
-}
-
-func (p *IntMap) Scan(src interface{}) error {
-	source, ok := src.([]byte)
-	if !ok {
-		return errors.New("Type assertion .([]byte) failed.")
-	}
-
-	var i map[string]int
-	err := json.Unmarshal(source, &i)
-	if err != nil {
-		return err
-	}
-
-	*p = i
-	return nil
-}
-
-type report struct {
-	Received time.Time // Only from DB
-
-	UniqueID       string
-	Version        string
-	LongVersion    string
-	Platform       string
-	NumFolders     int
-	NumDevices     int
-	TotFiles       int
-	FolderMaxFiles int
-	TotMiB         int
-	FolderMaxMiB   int
-	MemoryUsageMiB int
-	SHA256Perf     float64
-	MemorySize     int
-
-	// v2 fields
-
-	URVersion  int
-	NumCPU     int
-	FolderUses struct {
-		SendOnly            int
-		ReceiveOnly         int
-		IgnorePerms         int
-		IgnoreDelete        int
-		AutoNormalize       int
-		SimpleVersioning    int
-		ExternalVersioning  int
-		StaggeredVersioning int
-		TrashcanVersioning  int
-	}
-	DeviceUses struct {
-		Introducer       int
-		CustomCertName   int
-		CompressAlways   int
-		CompressMetadata int
-		CompressNever    int
-		DynamicAddr      int
-		StaticAddr       int
-	}
-	Announce struct {
-		GlobalEnabled     bool
-		LocalEnabled      bool
-		DefaultServersDNS int
-		DefaultServersIP  int
-		OtherServers      int
-	}
-	Relays struct {
-		Enabled        bool
-		DefaultServers int
-		OtherServers   int
-	}
-	UsesRateLimit        bool
-	UpgradeAllowedManual bool
-	UpgradeAllowedAuto   bool
-
-	// V2.5 fields (fields that were in v2 but never added to the database
-	UpgradeAllowedPre bool
-	RescanIntvs       pq.Int64Array
-
-	// v3 fields
-
-	Uptime                     int
-	NATType                    string
-	AlwaysLocalNets            bool
-	CacheIgnoredFiles          bool
-	OverwriteRemoteDeviceNames bool
-	ProgressEmitterEnabled     bool
-	CustomDefaultFolderPath    bool
-	WeakHashSelection          string
-	CustomTrafficClass         bool
-	CustomTempIndexMinBlocks   bool
-	TemporariesDisabled        bool
-	TemporariesCustom          bool
-	LimitBandwidthInLan        bool
-	CustomReleaseURL           bool
-	RestartOnWakeup            bool
-	CustomStunServers          bool
-
-	FolderUsesV3 struct {
-		ScanProgressDisabled    int
-		ConflictsDisabled       int
-		ConflictsUnlimited      int
-		ConflictsOther          int
-		DisableSparseFiles      int
-		DisableTempIndexes      int
-		AlwaysWeakHash          int
-		CustomWeakHashThreshold int
-		FsWatcherEnabled        int
-		PullOrder               IntMap
-		FilesystemType          IntMap
-		FsWatcherDelays         pq.Int64Array
-	}
-
-	GUIStats struct {
-		Enabled                   int
-		UseTLS                    int
-		UseAuth                   int
-		InsecureAdminAccess       int
-		Debugging                 int
-		InsecureSkipHostCheck     int
-		InsecureAllowFrameLoading int
-		ListenLocal               int
-		ListenUnspecified         int
-		Theme                     IntMap
-	}
-
-	BlockStats struct {
-		Total             int
-		Renamed           int
-		Reused            int
-		Pulled            int
-		CopyOrigin        int
-		CopyOriginShifted int
-		CopyElsewhere     int
-	}
-
-	TransportStats IntMap
-
-	IgnoreStats struct {
-		Lines           int
-		Inverts         int
-		Folded          int
-		Deletable       int
-		Rooted          int
-		Includes        int
-		EscapedIncludes int
-		DoubleStars     int
-		Stars           int
-	}
-
-	// V3 fields added late in the RC
-	WeakHashEnabled bool
-
-	// Generated
-
-	Date    string
-	Address string
-}
-
-func (r *report) Validate() error {
-	if r.UniqueID == "" || r.Version == "" || r.Platform == "" {
-		return errors.New("missing required field")
-	}
-	if len(r.Date) != 8 {
-		return errors.New("date not initialized")
-	}
-
-	// Some fields may not be null.
-	if r.RescanIntvs == nil {
-		r.RescanIntvs = []int64{}
-	}
-	if r.FolderUsesV3.FsWatcherDelays == nil {
-		r.FolderUsesV3.FsWatcherDelays = []int64{}
-	}
-
-	return nil
-}
-
-func (r *report) FieldPointers() []interface{} {
-	// All the fields of the report, in the same order as the database fields.
-	return []interface{}{
-		&r.Received, &r.UniqueID, &r.Version, &r.LongVersion, &r.Platform,
-		&r.NumFolders, &r.NumDevices, &r.TotFiles, &r.FolderMaxFiles,
-		&r.TotMiB, &r.FolderMaxMiB, &r.MemoryUsageMiB, &r.SHA256Perf,
-		&r.MemorySize, &r.Date,
-		// V2
-		&r.URVersion, &r.NumCPU, &r.FolderUses.SendOnly, &r.FolderUses.IgnorePerms,
-		&r.FolderUses.IgnoreDelete, &r.FolderUses.AutoNormalize, &r.DeviceUses.Introducer,
-		&r.DeviceUses.CustomCertName, &r.DeviceUses.CompressAlways,
-		&r.DeviceUses.CompressMetadata, &r.DeviceUses.CompressNever,
-		&r.DeviceUses.DynamicAddr, &r.DeviceUses.StaticAddr,
-		&r.Announce.GlobalEnabled, &r.Announce.LocalEnabled,
-		&r.Announce.DefaultServersDNS, &r.Announce.DefaultServersIP,
-		&r.Announce.OtherServers, &r.Relays.Enabled, &r.Relays.DefaultServers,
-		&r.Relays.OtherServers, &r.UsesRateLimit, &r.UpgradeAllowedManual,
-		&r.UpgradeAllowedAuto, &r.FolderUses.SimpleVersioning,
-		&r.FolderUses.ExternalVersioning, &r.FolderUses.StaggeredVersioning,
-		&r.FolderUses.TrashcanVersioning,
-
-		// V2.5
-		&r.UpgradeAllowedPre, &r.RescanIntvs,
-
-		// V3
-		&r.Uptime, &r.NATType, &r.AlwaysLocalNets, &r.CacheIgnoredFiles,
-		&r.OverwriteRemoteDeviceNames, &r.ProgressEmitterEnabled, &r.CustomDefaultFolderPath,
-		&r.WeakHashSelection, &r.CustomTrafficClass, &r.CustomTempIndexMinBlocks,
-		&r.TemporariesDisabled, &r.TemporariesCustom, &r.LimitBandwidthInLan,
-		&r.CustomReleaseURL, &r.RestartOnWakeup, &r.CustomStunServers,
-
-		&r.FolderUsesV3.ScanProgressDisabled, &r.FolderUsesV3.ConflictsDisabled,
-		&r.FolderUsesV3.ConflictsUnlimited, &r.FolderUsesV3.ConflictsOther,
-		&r.FolderUsesV3.DisableSparseFiles, &r.FolderUsesV3.DisableTempIndexes,
-		&r.FolderUsesV3.AlwaysWeakHash, &r.FolderUsesV3.CustomWeakHashThreshold,
-		&r.FolderUsesV3.FsWatcherEnabled,
-
-		&r.FolderUsesV3.PullOrder, &r.FolderUsesV3.FilesystemType,
-		&r.FolderUsesV3.FsWatcherDelays,
-
-		&r.GUIStats.Enabled, &r.GUIStats.UseTLS, &r.GUIStats.UseAuth,
-		&r.GUIStats.InsecureAdminAccess,
-		&r.GUIStats.Debugging, &r.GUIStats.InsecureSkipHostCheck,
-		&r.GUIStats.InsecureAllowFrameLoading, &r.GUIStats.ListenLocal,
-		&r.GUIStats.ListenUnspecified, &r.GUIStats.Theme,
-
-		&r.BlockStats.Total, &r.BlockStats.Renamed,
-		&r.BlockStats.Reused, &r.BlockStats.Pulled, &r.BlockStats.CopyOrigin,
-		&r.BlockStats.CopyOriginShifted, &r.BlockStats.CopyElsewhere,
-
-		&r.TransportStats,
-
-		&r.IgnoreStats.Lines, &r.IgnoreStats.Inverts, &r.IgnoreStats.Folded,
-		&r.IgnoreStats.Deletable, &r.IgnoreStats.Rooted, &r.IgnoreStats.Includes,
-		&r.IgnoreStats.EscapedIncludes, &r.IgnoreStats.DoubleStars, &r.IgnoreStats.Stars,
-
-		// V3 added late in the RC
-		&r.WeakHashEnabled,
-		&r.Address,
-
-		// Receive only folders
-		&r.FolderUses.ReceiveOnly,
-	}
-}
-
-func (r *report) FieldNames() []string {
-	// The database fields that back this struct in PostgreSQL
-	return []string{
-		// V1
-		"Received",
-		"UniqueID",
-		"Version",
-		"LongVersion",
-		"Platform",
-		"NumFolders",
-		"NumDevices",
-		"TotFiles",
-		"FolderMaxFiles",
-		"TotMiB",
-		"FolderMaxMiB",
-		"MemoryUsageMiB",
-		"SHA256Perf",
-		"MemorySize",
-		"Date",
-		// V2
-		"ReportVersion",
-		"NumCPU",
-		"FolderRO",
-		"FolderIgnorePerms",
-		"FolderIgnoreDelete",
-		"FolderAutoNormalize",
-		"DeviceIntroducer",
-		"DeviceCustomCertName",
-		"DeviceCompressAlways",
-		"DeviceCompressMetadata",
-		"DeviceCompressNever",
-		"DeviceDynamicAddr",
-		"DeviceStaticAddr",
-		"AnnounceGlobalEnabled",
-		"AnnounceLocalEnabled",
-		"AnnounceDefaultServersDNS",
-		"AnnounceDefaultServersIP",
-		"AnnounceOtherServers",
-		"RelayEnabled",
-		"RelayDefaultServers",
-		"RelayOtherServers",
-		"RateLimitEnabled",
-		"UpgradeAllowedManual",
-		"UpgradeAllowedAuto",
-		// v0.12.19+
-		"FolderSimpleVersioning",
-		"FolderExternalVersioning",
-		"FolderStaggeredVersioning",
-		"FolderTrashcanVersioning",
-		// V2.5
-		"UpgradeAllowedPre",
-		"RescanIntvs",
-		// V3
-		"Uptime",
-		"NATType",
-		"AlwaysLocalNets",
-		"CacheIgnoredFiles",
-		"OverwriteRemoteDeviceNames",
-		"ProgressEmitterEnabled",
-		"CustomDefaultFolderPath",
-		"WeakHashSelection",
-		"CustomTrafficClass",
-		"CustomTempIndexMinBlocks",
-		"TemporariesDisabled",
-		"TemporariesCustom",
-		"LimitBandwidthInLan",
-		"CustomReleaseURL",
-		"RestartOnWakeup",
-		"CustomStunServers",
-
-		"FolderScanProgressDisabled",
-		"FolderConflictsDisabled",
-		"FolderConflictsUnlimited",
-		"FolderConflictsOther",
-		"FolderDisableSparseFiles",
-		"FolderDisableTempIndexes",
-		"FolderAlwaysWeakHash",
-		"FolderCustomWeakHashThreshold",
-		"FolderFsWatcherEnabled",
-		"FolderPullOrder",
-		"FolderFilesystemType",
-		"FolderFsWatcherDelays",
-
-		"GUIEnabled",
-		"GUIUseTLS",
-		"GUIUseAuth",
-		"GUIInsecureAdminAccess",
-		"GUIDebugging",
-		"GUIInsecureSkipHostCheck",
-		"GUIInsecureAllowFrameLoading",
-		"GUIListenLocal",
-		"GUIListenUnspecified",
-		"GUITheme",
-
-		"BlocksTotal",
-		"BlocksRenamed",
-		"BlocksReused",
-		"BlocksPulled",
-		"BlocksCopyOrigin",
-		"BlocksCopyOriginShifted",
-		"BlocksCopyElsewhere",
-
-		"Transport",
-
-		"IgnoreLines",
-		"IgnoreInverts",
-		"IgnoreFolded",
-		"IgnoreDeletable",
-		"IgnoreRooted",
-		"IgnoreIncludes",
-		"IgnoreEscapedIncludes",
-		"IgnoreDoubleStars",
-		"IgnoreStars",
-
-		// V3 added late in the RC
-		"WeakHashEnabled",
-		"Address",
-
-		// Receive only folders
-		"FolderRecvOnly",
-	}
-}
-
 func setupDB(db *sql.DB) error {
-	_, err := db.Exec(`CREATE TABLE IF NOT EXISTS Reports (
+	_, err := db.Exec(`CREATE TABLE IF NOT EXISTS ReportsJson (
 		Received TIMESTAMP NOT NULL,
-		UniqueID VARCHAR(32) NOT NULL,
-		Version VARCHAR(32) NOT NULL,
-		LongVersion VARCHAR(256) NOT NULL,
-		Platform VARCHAR(32) NOT NULL,
-		NumFolders INTEGER NOT NULL,
-		NumDevices INTEGER NOT NULL,
-		TotFiles INTEGER NOT NULL,
-		FolderMaxFiles INTEGER NOT NULL,
-		TotMiB INTEGER NOT NULL,
-		FolderMaxMiB INTEGER NOT NULL,
-		MemoryUsageMiB INTEGER NOT NULL,
-		SHA256Perf DOUBLE PRECISION NOT NULL,
-		MemorySize INTEGER NOT NULL,
-		Date VARCHAR(8) NOT NULL
+		Report JSONB NOT NULL
 	)`)
 	if err != nil {
 		return err
 	}

 	var t string
-	row := db.QueryRow(`SELECT 'UniqueIDIndex'::regclass`)
-	if err := row.Scan(&t); err != nil {
-		if _, err = db.Exec(`CREATE UNIQUE INDEX UniqueIDIndex ON Reports (Date, UniqueID)`); err != nil {
+	if err := db.QueryRow(`SELECT 'UniqueIDJsonIndex'::regclass`).Scan(&t); err != nil {
+		if _, err = db.Exec(`CREATE UNIQUE INDEX UniqueIDJsonIndex ON ReportsJson ((Report->>'date'), (Report->>'uniqueID'))`); err != nil {
 			return err
 		}
 	}

-	row = db.QueryRow(`SELECT 'ReceivedIndex'::regclass`)
-	if err := row.Scan(&t); err != nil {
-		if _, err = db.Exec(`CREATE INDEX ReceivedIndex ON Reports (Received)`); err != nil {
+	if err := db.QueryRow(`SELECT 'ReceivedJsonIndex'::regclass`).Scan(&t); err != nil {
+		if _, err = db.Exec(`CREATE INDEX ReceivedJsonIndex ON ReportsJson (Received)`); err != nil {
 			return err
 		}
 	}

-	// V2
-
-	row = db.QueryRow(`SELECT attname FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'reports') AND attname = 'reportversion'`)
-	if err := row.Scan(&t); err != nil {
-		// The ReportVersion column doesn't exist; add the new columns.
-		_, err = db.Exec(`ALTER TABLE Reports
-		ADD COLUMN ReportVersion INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN NumCPU INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderRO  INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderIgnorePerms INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderIgnoreDelete INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderAutoNormalize INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceIntroducer INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceCustomCertName INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceCompressAlways INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceCompressMetadata INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceCompressNever INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceDynamicAddr INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN DeviceStaticAddr INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN AnnounceGlobalEnabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN AnnounceLocalEnabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN AnnounceDefaultServersDNS INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN AnnounceDefaultServersIP INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN AnnounceOtherServers INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN RelayEnabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN RelayDefaultServers INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN RelayOtherServers INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN RateLimitEnabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN UpgradeAllowedManual BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN UpgradeAllowedAuto BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN FolderSimpleVersioning INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderExternalVersioning INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderStaggeredVersioning INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderTrashcanVersioning INTEGER NOT NULL DEFAULT 0
-		`)
-		if err != nil {
+	if err := db.QueryRow(`SELECT 'ReportVersionJsonIndex'::regclass`).Scan(&t); err != nil {
+		if _, err = db.Exec(`CREATE INDEX ReportVersionJsonIndex ON ReportsJson (cast((Report->>'urVersion') as numeric))`); err != nil {
 			return err
 		}
 	}

-	row = db.QueryRow(`SELECT 'ReportVersionIndex'::regclass`)
-	if err := row.Scan(&t); err != nil {
-		if _, err = db.Exec(`CREATE INDEX ReportVersionIndex ON Reports (ReportVersion)`); err != nil {
-			return err
-		}
-	}
-
-	// V2.5
-
-	row = db.QueryRow(`SELECT attname FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'reports') AND attname = 'upgradeallowedpre'`)
-	if err := row.Scan(&t); err != nil {
-		// The ReportVersion column doesn't exist; add the new columns.
-		_, err = db.Exec(`ALTER TABLE Reports
-		ADD COLUMN UpgradeAllowedPre BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN RescanIntvs INT[] NOT NULL DEFAULT '{}'
-		`)
-		if err != nil {
-			return err
-		}
-	}
-
-	// V3
-
-	row = db.QueryRow(`SELECT attname FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'reports') AND attname = 'uptime'`)
-	if err := row.Scan(&t); err != nil {
-		// The Uptime column doesn't exist; add the new columns.
-		_, err = db.Exec(`ALTER TABLE Reports
-		ADD COLUMN Uptime INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN NATType VARCHAR(32) NOT NULL DEFAULT '',
-		ADD COLUMN AlwaysLocalNets BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN CacheIgnoredFiles BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN OverwriteRemoteDeviceNames BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN ProgressEmitterEnabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN CustomDefaultFolderPath BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN WeakHashSelection VARCHAR(32) NOT NULL DEFAULT '',
-		ADD COLUMN CustomTrafficClass BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN CustomTempIndexMinBlocks BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN TemporariesDisabled BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN TemporariesCustom BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN LimitBandwidthInLan BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN CustomReleaseURL BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN RestartOnWakeup BOOLEAN NOT NULL DEFAULT FALSE,
-		ADD COLUMN CustomStunServers BOOLEAN NOT NULL DEFAULT FALSE,
-
-		ADD COLUMN FolderScanProgressDisabled INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderConflictsDisabled INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderConflictsUnlimited INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderConflictsOther INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderDisableSparseFiles INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderDisableTempIndexes INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderAlwaysWeakHash INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderCustomWeakHashThreshold INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderFsWatcherEnabled INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN FolderPullOrder JSONB NOT NULL DEFAULT '{}',
-		ADD COLUMN FolderFilesystemType JSONB NOT NULL DEFAULT '{}',
-		ADD COLUMN FolderFsWatcherDelays INT[] NOT NULL DEFAULT '{}',
-
-		ADD COLUMN GUIEnabled INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIUseTLS INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIUseAuth INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIInsecureAdminAccess INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIDebugging INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIInsecureSkipHostCheck INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIInsecureAllowFrameLoading INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIListenLocal INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUIListenUnspecified INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN GUITheme JSONB NOT NULL DEFAULT '{}',
-
-		ADD COLUMN BlocksTotal INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksRenamed INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksReused INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksPulled INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksCopyOrigin INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksCopyOriginShifted INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN BlocksCopyElsewhere INTEGER NOT NULL DEFAULT 0,
-
-		ADD COLUMN Transport JSONB NOT NULL DEFAULT '{}',
-
-		ADD COLUMN IgnoreLines INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreInverts INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreFolded INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreDeletable INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreRooted INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreIncludes INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreEscapedIncludes INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreDoubleStars INTEGER NOT NULL DEFAULT 0,
-		ADD COLUMN IgnoreStars INTEGER NOT NULL DEFAULT 0
-		`)
-		if err != nil {
-			return err
-		}
-	}
-
-	// V3 added late in the RC
-
-	row = db.QueryRow(`SELECT attname FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'reports') AND attname = 'weakhashenabled'`)
-	if err := row.Scan(&t); err != nil {
-		// The WeakHashEnabled column doesn't exist; add the new columns.
-		_, err = db.Exec(`ALTER TABLE Reports
-		ADD COLUMN WeakHashEnabled BOOLEAN NOT NULL DEFAULT FALSE
-		ADD COLUMN Address VARCHAR(45) NOT NULL DEFAULT ''
-		`)
-		if err != nil {
-			return err
-		}
-	}
-
-	// Receive only added ad-hoc
-
-	row = db.QueryRow(`SELECT attname FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'reports') AND attname = 'folderrecvonly'`)
-	if err := row.Scan(&t); err != nil {
-		// The RecvOnly column doesn't exist; add it.
-		_, err = db.Exec(`ALTER TABLE Reports
-		ADD COLUMN FolderRecvOnly INTEGER NOT NULL DEFAULT 0
-		`)
-		if err != nil {
-			return err
-		}
+	// Migrate from old schema to new schema if the table exists.
+	if err := migrate(db); err != nil {
+		return err
 	}

 	return nil
 }

-func insertReport(db *sql.DB, r report) error {
-	r.Received = time.Now().UTC()
-	fields := r.FieldPointers()
-	params := make([]string, len(fields))
-	for i := range params {
-		params[i] = fmt.Sprintf("$%d", i+1)
-	}
-	query := "INSERT INTO Reports (" + strings.Join(r.FieldNames(), ", ") + ") VALUES (" + strings.Join(params, ", ") + ")"
-	_, err := db.Exec(query, fields...)
+func insertReport(db *sql.DB, r contract.Report) error {
+	_, err := db.Exec("INSERT INTO ReportsJson (Report, Received) VALUES ($1, $2)", r, time.Now().UTC())

 	return err
 }
@@ -688,9 +147,9 @@ func insertReport(db *sql.DB, r report) error {
 type withDBFunc func(*sql.DB, http.ResponseWriter, *http.Request)

 func withDB(db *sql.DB, f withDBFunc) http.HandlerFunc {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
 		f(db, w, r)
-	})
+	}
 }

 func main() {
@@ -754,6 +213,7 @@ func main() {
 	http.HandleFunc("/movement.json", withDB(db, movementHandler))
 	http.HandleFunc("/performance.json", withDB(db, performanceHandler))
 	http.HandleFunc("/blockstats.json", withDB(db, blockStatsHandler))
+	http.HandleFunc("/locations.json", withDB(db, locationsHandler))
 	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))

 	go cacheRefresher(db)
@@ -765,9 +225,10 @@ func main() {
 }

 var (
-	cacheData []byte
-	cacheTime time.Time
-	cacheMut  sync.Mutex
+	cachedIndex     []byte
+	cachedLocations []byte
+	cacheTime       time.Time
+	cacheMut        sync.Mutex
 )

 const maxCacheTime = 15 * time.Minute
@@ -775,7 +236,7 @@ const maxCacheTime = 15 * time.Minute
 func cacheRefresher(db *sql.DB) {
 	ticker := time.NewTicker(maxCacheTime - time.Minute)
 	defer ticker.Stop()
-	for range ticker.C {
+	for ; true; <-ticker.C {
 		cacheMut.Lock()
 		if err := refreshCacheLocked(db); err != nil {
 			log.Println(err)
@@ -791,8 +252,15 @@ func refreshCacheLocked(db *sql.DB) error {
 	if err != nil {
 		return err
 	}
-	cacheData = buf.Bytes()
+	cachedIndex = buf.Bytes()
 	cacheTime = time.Now()
+
+	locs := rep["locations"].(map[location]int)
+	wlocs := make([]weightedLocation, 0, len(locs))
+	for loc, w := range locs {
+		wlocs = append(wlocs, weightedLocation{loc, w})
+	}
+	cachedLocations, _ = json.Marshal(wlocs)
 	return nil
 }

@@ -810,13 +278,29 @@ func rootHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 		}

 		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		w.Write(cacheData)
+		w.Write(cachedIndex)
 	} else {
 		http.Error(w, "Not found", 404)
 		return
 	}
 }

+func locationsHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
+	cacheMut.Lock()
+	defer cacheMut.Unlock()
+
+	if time.Since(cacheTime) > maxCacheTime {
+		if err := refreshCacheLocked(db); err != nil {
+			log.Println(err)
+			http.Error(w, "Template Error", http.StatusInternalServerError)
+			return
+		}
+	}
+
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Write(cachedLocations)
+}
+
 func newDataHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	defer r.Body.Close()

@@ -835,7 +319,7 @@ func newDataHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 		addr = ""
 	}

-	var rep report
+	var rep contract.Report
 	rep.Date = time.Now().UTC().Format("20060102")
 	rep.Address = addr

@@ -860,7 +344,7 @@ func newDataHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 	}

 	if err := insertReport(db, rep); err != nil {
-		if err.Error() == `pq: duplicate key value violates unique constraint "uniqueidindex"` {
+		if err.Error() == `pq: duplicate key value violates unique constraint "uniqueidjsonindex"` {
 			// We already have a report today for the same unique ID; drop
 			// this one without complaining.
 			return
@@ -875,7 +359,8 @@ func newDataHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
 }

 func summaryHandler(db *sql.DB, w http.ResponseWriter, r *http.Request) {
-	s, err := getSummary(db)
+	min, _ := strconv.Atoi(r.URL.Query().Get("min"))
+	s, err := getSummary(db, min)
 	if err != nil {
 		log.Println("summaryHandler:", err)
 		http.Error(w, "Database Error", http.StatusInternalServerError)
@@ -1016,8 +501,13 @@ func inc(storage map[string]int, key string, i interface{}) {
 }

 type location struct {
-	Latitude  float64
-	Longitude float64
+	Latitude  float64 `json:"lat"`
+	Longitude float64 `json:"lon"`
+}
+
+type weightedLocation struct {
+	location
+	Weight int `json:"weight"`
 }

 func getReport(db *sql.DB) map[string]interface{} {
@@ -1037,11 +527,11 @@ func getReport(db *sql.DB) map[string]interface{} {
 	var numDevices []int
 	var totFiles []int
 	var maxFiles []int
-	var totMiB []int
-	var maxMiB []int
-	var memoryUsage []int
+	var totMiB []int64
+	var maxMiB []int64
+	var memoryUsage []int64
 	var sha256Perf []float64
-	var memorySize []int
+	var memorySize []int64
 	var uptime []int
 	var compilers []string
 	var builders []string
@@ -1080,9 +570,9 @@ func getReport(db *sql.DB) map[string]interface{} {

 	var numCPU []int

-	var rep report
+	var rep contract.Report

-	rows, err := db.Query(`SELECT ` + strings.Join(rep.FieldNames(), ",") + ` FROM Reports WHERE Received > now() - '1 day'::INTERVAL`)
+	rows, err := db.Query(`SELECT Received, Report FROM ReportsJson WHERE Received > now() - '1 day'::INTERVAL`)
 	if err != nil {
 		log.Println("sql:", err)
 		return nil
@@ -1090,7 +580,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 	defer rows.Close()

 	for rows.Next() {
-		err := rows.Scan(rep.FieldPointers()...)
+		err := rows.Scan(&rep.Received, &rep)

 		if err != nil {
 			log.Println("sql:", err)
@@ -1141,19 +631,19 @@ func getReport(db *sql.DB) map[string]interface{} {
 			maxFiles = append(maxFiles, rep.FolderMaxFiles)
 		}
 		if rep.TotMiB > 0 {
-			totMiB = append(totMiB, rep.TotMiB*(1<<20))
+			totMiB = append(totMiB, int64(rep.TotMiB)*(1<<20))
 		}
 		if rep.FolderMaxMiB > 0 {
-			maxMiB = append(maxMiB, rep.FolderMaxMiB*(1<<20))
+			maxMiB = append(maxMiB, int64(rep.FolderMaxMiB)*(1<<20))
 		}
 		if rep.MemoryUsageMiB > 0 {
-			memoryUsage = append(memoryUsage, rep.MemoryUsageMiB*(1<<20))
+			memoryUsage = append(memoryUsage, int64(rep.MemoryUsageMiB)*(1<<20))
 		}
 		if rep.SHA256Perf > 0 {
 			sha256Perf = append(sha256Perf, rep.SHA256Perf*(1<<20))
 		}
 		if rep.MemorySize > 0 {
-			memorySize = append(memorySize, rep.MemorySize*(1<<20))
+			memorySize = append(memorySize, int64(rep.MemorySize)*(1<<20))
 		}
 		if rep.Uptime > 0 {
 			uptime = append(uptime, rep.Uptime)
@@ -1235,8 +725,8 @@ func getReport(db *sql.DB) map[string]interface{} {

 			if rep.NATType != "" {
 				natType := rep.NATType
-				natType = strings.Replace(natType, "unknown", "Unknown", -1)
-				natType = strings.Replace(natType, "Symetric", "Symmetric", -1)
+				natType = strings.ReplaceAll(natType, "unknown", "Unknown")
+				natType = strings.ReplaceAll(natType, "Symetric", "Symmetric")
 				add(featureGroups["Various"]["v3"], "NAT Type", natType, 1)
 			}

@@ -1254,6 +744,8 @@ func getReport(db *sql.DB) map[string]interface{} {
 			inc(features["Folder"]["v3"], "Weak hash, always", rep.FolderUsesV3.AlwaysWeakHash)
 			inc(features["Folder"]["v3"], "Weak hash, custom threshold", rep.FolderUsesV3.CustomWeakHashThreshold)
 			inc(features["Folder"]["v3"], "Filesystem watcher", rep.FolderUsesV3.FsWatcherEnabled)
+			inc(features["Folder"]["v3"], "Case sensitive FS", rep.FolderUsesV3.CaseSensitiveFS)
+			inc(features["Folder"]["v3"], "Mode, receive encrypted", rep.FolderUsesV3.ReceiveEncrypted)

 			add(featureGroups["Folder"]["v3"], "Conflicts", "Disabled", rep.FolderUsesV3.ConflictsDisabled)
 			add(featureGroups["Folder"]["v3"], "Conflicts", "Unlimited", rep.FolderUsesV3.ConflictsUnlimited)
@@ -1263,6 +755,8 @@ func getReport(db *sql.DB) map[string]interface{} {
 				add(featureGroups["Folder"]["v3"], "Pull Order", prettyCase(key), value)
 			}

+			inc(features["Device"]["v3"], "Untrusted", rep.DeviceUsesV3.Untrusted)
+
 			totals["GUI"] += rep.GUIStats.Enabled

 			inc(features["GUI"]["v3"], "Auth Enabled", rep.GUIStats.UseAuth)
@@ -1304,14 +798,14 @@ func getReport(db *sql.DB) map[string]interface{} {
 	})

 	categories = append(categories, category{
-		Values: statsForInts(totMiB),
+		Values: statsForInt64s(totMiB),
 		Descr:  "Data Managed per Device",
 		Unit:   "B",
 		Type:   NumberBinary,
 	})

 	categories = append(categories, category{
-		Values: statsForInts(maxMiB),
+		Values: statsForInt64s(maxMiB),
 		Descr:  "Data in Largest Folder",
 		Unit:   "B",
 		Type:   NumberBinary,
@@ -1328,14 +822,14 @@ func getReport(db *sql.DB) map[string]interface{} {
 	})

 	categories = append(categories, category{
-		Values: statsForInts(memoryUsage),
+		Values: statsForInt64s(memoryUsage),
 		Descr:  "Memory Usage",
 		Unit:   "B",
 		Type:   NumberBinary,
 	})

 	categories = append(categories, category{
-		Values: statsForInts(memorySize),
+		Values: statsForInt64s(memorySize),
 		Descr:  "System Memory",
 		Unit:   "B",
 		Type:   NumberBinary,
@@ -1429,7 +923,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 }

 var (
-	plusRe  = regexp.MustCompile(`\+.*$`)
+	plusRe  = regexp.MustCompile(`(\+.*|\.dev\..*)$`)
 	plusStr = "(+dev)"
 )

@@ -1488,7 +982,9 @@ func (s *summary) MarshalJSON() ([]byte, error) {
 	for v := range s.versions {
 		versions = append(versions, v)
 	}
-	sort.Strings(versions)
+	sort.Slice(versions, func(a, b int) bool {
+		return upgrade.CompareVersions(versions[a], versions[b]) < 0
+	})

 	var filtered []string
 	for _, v := range versions {
@@ -1528,7 +1024,21 @@ func (s *summary) MarshalJSON() ([]byte, error) {
 	return json.Marshal(table)
 }

-func getSummary(db *sql.DB) (summary, error) {
+// filter removes versions that never reach the specified min count.
+func (s *summary) filter(min int) {
+	// We cheat and just remove the versions from the "index" and leave the
+	// data points alone. The version index is used to build the table when
+	// we do the serialization, so at that point the data points are
+	// filtered out as well.
+	for ver := range s.versions {
+		if s.max[ver] < min {
+			delete(s.versions, ver)
+			delete(s.max, ver)
+		}
+	}
+}
+
+func getSummary(db *sql.DB, min int) (summary, error) {
 	s := newSummary()

 	rows, err := db.Query(`SELECT Day, Version, Count FROM VersionSummary WHERE Day > now() - '2 year'::INTERVAL;`)
@@ -1559,6 +1069,7 @@ func getSummary(db *sql.DB) (summary, error) {
 		s.setCount(day.Format("2006-01-02"), ver, num)
 	}

+	s.filter(min)
 	return s, nil
 }

--- a/cmd/ursrv/migration.go
+++ b/cmd/ursrv/migration.go
@@ -0,0 +1,143 @@
+// Copyright (C) 2020 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
+	"log"
+	"strings"
+
+	"github.com/lib/pq"
+
+	"github.com/syncthing/syncthing/lib/ur/contract"
+)
+
+func migrate(db *sql.DB) error {
+	var count uint64
+	log.Println("Checking old table row count, this might take a while...")
+	if err := db.QueryRow(`SELECT COUNT(1) FROM Reports`).Scan(&count); err != nil || count == 0 {
+		// err != nil most likely means table does not exist.
+		return nil
+	}
+	log.Printf("Found %d records, will perform migration.", count)
+
+	tx, err := db.Begin()
+	if err != nil {
+		log.Println("sql:", err)
+		return err
+	}
+	defer tx.Rollback()
+
+	// These must be lower case, because we don't quote them when creating, so postgres creates them lower case.
+	// Yet pg.CopyIn quotes them, which makes them case sensitive.
+	stmt, err := tx.Prepare(pq.CopyIn("reportsjson", "received", "report"))
+	if err != nil {
+		log.Println("sql:", err)
+		return err
+	}
+
+	// Custom types used in the old struct.
+	var rep contract.Report
+	var rescanIntvs pq.Int64Array
+	var fsWatcherDelay pq.Int64Array
+	pullOrder := make(IntMap)
+	fileSystemType := make(IntMap)
+	themes := make(IntMap)
+	transportStats := make(IntMap)
+
+	rows, err := db.Query(`SELECT ` + strings.Join(rep.FieldNames(), ", ") + `, FolderFsWatcherDelays, RescanIntvs, FolderPullOrder, FolderFilesystemType, GUITheme, Transport FROM Reports`)
+	if err != nil {
+		log.Println("sql:", err)
+		return err
+	}
+	defer rows.Close()
+
+	var done uint64
+	pct := count / 100
+
+	for rows.Next() {
+		err := rows.Scan(append(rep.FieldPointers(), &fsWatcherDelay, &rescanIntvs, &pullOrder, &fileSystemType, &themes, &transportStats)...)
+		if err != nil {
+			log.Println("sql scan:", err)
+			return err
+		}
+		// Patch up parts that used to use custom types
+		rep.RescanIntvs = make([]int, len(rescanIntvs))
+		for i := range rescanIntvs {
+			rep.RescanIntvs[i] = int(rescanIntvs[i])
+		}
+		rep.FolderUsesV3.FsWatcherDelays = make([]int, len(fsWatcherDelay))
+		for i := range fsWatcherDelay {
+			rep.FolderUsesV3.FsWatcherDelays[i] = int(fsWatcherDelay[i])
+		}
+		rep.FolderUsesV3.PullOrder = pullOrder
+		rep.FolderUsesV3.FilesystemType = fileSystemType
+		rep.GUIStats.Theme = themes
+		rep.TransportStats = transportStats
+
+		_, err = stmt.Exec(rep.Received, rep)
+		if err != nil {
+			log.Println("sql insert:", err)
+			return err
+		}
+		done++
+		if done%pct == 0 {
+			log.Printf("Migration progress %d/%d (%d%%)", done, count, (100*done)/count)
+		}
+	}
+
+	// Tell the driver bulk copy is finished
+	_, err = stmt.Exec()
+	if err != nil {
+		log.Println("sql stmt exec:", err)
+		return err
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		log.Println("sql stmt close:", err)
+		return err
+	}
+
+	_, err = tx.Exec("DROP TABLE Reports")
+	if err != nil {
+		log.Println("sql drop:", err)
+		return err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		log.Println("sql commit:", err)
+		return err
+	}
+	return nil
+}
+
+type IntMap map[string]int
+
+func (p IntMap) Value() (driver.Value, error) {
+	return json.Marshal(p)
+}
+
+func (p *IntMap) Scan(src interface{}) error {
+	source, ok := src.([]byte)
+	if !ok {
+		return errors.New("Type assertion .([]byte) failed.")
+	}
+
+	var i map[string]int
+	err := json.Unmarshal(source, &i)
+	if err != nil {
+		return err
+	}
+
+	*p = i
+	return nil
+}
--- a/cmd/ursrv/static/index.html
+++ b/cmd/ursrv/static/index.html
@@ -17,7 +17,11 @@ found in the LICENSE file.
  <link href="static/bootstrap/css/bootstrap.min.css" rel="stylesheet">
  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
  <script type="text/javascript" src="static/bootstrap/js/bootstrap.min.js"></script>
-  <script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=visualization&key=AIzaSyDk5WJ8s7ueLKb99X5DbQ-vkWtPDAKqYs0"></script>
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.css">
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/heatmapjs@2.0.2/heatmap.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/leaflet-heatmap@1.0.0/leaflet-heatmap.js"></script>
+
  <style type="text/css">
    body {
      margin: 40px;
@@ -36,23 +40,25 @@ found in the LICENSE file.
    }
  </style>
  <script type="text/javascript"
-          src="https://www.google.com/jsapi?autoload={
-            'modules':[{
-              'name':'visualization',
-              'version':'1',
-              'packages':['corechart']
+          src='https://www.google.com/jsapi?autoload={
+            "modules":[{
+              "name":"visualization",
+              "version":"1",
+              "packages":["corechart"]
            }]
-          }"></script>
+          }'></script>

  <script type="text/javascript">
    google.setOnLoadCallback(drawVersionChart);
    google.setOnLoadCallback(drawMovementChart);
    google.setOnLoadCallback(drawBlockStatsChart);
    google.setOnLoadCallback(drawPerformanceCharts);
-    google.setOnLoadCallback(drawHeatMap);

    function drawVersionChart() {
-      var jsonData = $.ajax({url: "summary.json", dataType:"json", async: false}).responseText;
+      // Summary version chart for versions that at some point in the chart
+      // reaches 250 devices. This filters out versions that are old and
+      // uninteresting yet linger forever with like four users.
+      var jsonData = $.ajax({url: "summary.json?min=250", dataType:"json", async: false}).responseText;
      var rows = JSON.parse(jsonData);

      var data = new google.visualization.DataTable();
@@ -211,47 +217,46 @@ found in the LICENSE file.

    var locations = [];
    {{range $location, $weight := .locations}}
-    locations.push({location: new google.maps.LatLng({{- $location.Latitude -}}, {{- $location.Longitude -}}), weight: {{- $weight -}}});
+    locations.push({lat:{{- $location.Latitude -}},lng:{{- $location.Longitude -}},count:Math.min(100, {{- $weight -}})});
    {{- end}}

    function drawHeatMap() {
      if (locations.length == 0) {
        return;
      }
-      var mapBounds = new google.maps.LatLngBounds();
-      var map = new google.maps.Map(document.getElementById('map'), {
-        zoom: 1,
-        mapTypeId: google.maps.MapTypeId.ROADMAP
-      });
-      var heatmap = new google.maps.visualization.HeatmapLayer({
+      var testData = {
        data: locations
+      };
+
+      var baseLayer = L.tileLayer(
+        'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{
+          attribution: '...',
+          maxZoom: 18
+        }
+      );
+      var cfg = {
+        "radius": 1,
+        "minOpacity": .25,
+        "maxOpacity": .8,
+        "scaleRadius": true,
+        "useLocalExtrema": true,
+        latField: 'lat',
+        lngField: 'lng',
+        valueField: 'count',
+        gradient: {
+            '.1': 'cyan',
+            '.8': 'blue',
+            '.95': 'red'
+          }
+      };
+      var heatmapLayer = new HeatmapOverlay(cfg);
+
+      var map = new L.Map('map', {
+        center: new L.LatLng(25, 0),
+        zoom: 1,
+        layers: [baseLayer, heatmapLayer]
      });
-      heatmap.set('radius', 10);
-      heatmap.set('maxIntensity', 20);
-      heatmap.set('gradient', [
-        'rgba(0, 255, 255, 0)',
-        'rgba(0, 255, 255, 1)',
-        'rgba(0, 191, 255, 1)',
-        'rgba(0, 127, 255, 1)',
-        'rgba(0, 63, 255, 1)',
-        'rgba(0, 0, 255, 1)',
-        'rgba(0, 0, 223, 1)',
-        'rgba(0, 0, 191, 1)',
-        'rgba(0, 0, 159, 1)',
-        'rgba(0, 0, 127, 1)',
-        'rgba(63, 0, 91, 1)',
-        'rgba(127, 0, 63, 1)',
-        'rgba(191, 0, 31, 1)',
-        'rgba(255, 0, 0, 1)'
-      ]);
-      heatmap.setMap(map);
-      for (var x = 0; x < locations.length; x++) {
-        mapBounds.extend(locations[x].location);
-      }
-      map.fitBounds(mapBounds);
-      if (locations.length == 1) {
-        map.setZoom(13);
-      }
+      heatmapLayer.setData(testData);
    }
  </script>
 </head>
@@ -296,7 +301,7 @@ found in the LICENSE file.
        {{if .locations}}
        <div class="img-thumbnail" id="map" style="width: 1130px; height: 400px; padding: 10px;"></div>
        <p class="text-muted">
-         Heatmap max intensity is capped at 20 reports within a location.
+         Heatmap max intensity is capped at 100 reports within a location.
        </p>
        <div class="panel panel-default">
          <div class="panel-heading">
@@ -651,6 +656,7 @@ found in the LICENSE file.
  </p>
  <script type="text/javascript">
    $('[data-toggle="tooltip"]').tooltip({html:true});
+    drawHeatMap();
  </script>
 </body>
 </html>
--- a/etc/firewall-ufw/syncthing
+++ b/etc/firewall-ufw/syncthing
@@ -1,7 +1,7 @@
 [syncthing]
 title=Syncthing
 description=Syncthing file synchronisation
-ports=22000/tcp|21027/udp
+ports=22000|21027/udp

 [syncthing-gui]
 title=Syncthing-GUI
--- a/etc/freebsd-rc/syncthing
+++ b/etc/freebsd-rc/syncthing
@@ -38,13 +38,14 @@ syncthing_group=${syncthing_group:-$syncthing_user}

 command=/usr/local/bin/syncthing
 pidfile=/var/run/syncthing.pid
-syncthing_flags="${syncthing_home:+-home=${syncthing_home}} ${syncthing_log_file:+-logfile=${syncthing_log_file}}"
+syncthing_cmd=serve
+syncthing_flags="${syncthing_home:+--home=${syncthing_home}} ${syncthing_log_file:+--logfile=${syncthing_log_file}}"

 syncthing_start() {
    echo "Starting syncthing"
    touch ${pidfile} && chown ${syncthing_user} ${pidfile}
    touch ${syncthing_log_file} && chown ${syncthing_user} ${syncthing_log_file}
-    /usr/sbin/daemon -cf -p ${pidfile} -u ${syncthing_user} ${command} ${syncthing_flags}
+    /usr/sbin/daemon -cf -p ${pidfile} -u ${syncthing_user} ${command} ${syncthing_cmd} ${syncthing_flags}
 }

 syncthing_cleanup() {
--- a/etc/linux-desktop/syncthing-start.desktop
+++ b/etc/linux-desktop/syncthing-start.desktop
@@ -2,7 +2,7 @@
 Name=Start Syncthing
 GenericName=File synchronization
 Comment=Starts the main syncthing process in the background.
-Exec=/usr/bin/syncthing -no-browser -logfile=~/.config/syncthing/syncthing.log
+Exec=/usr/bin/syncthing serve --no-browser --logfile=default
 Icon=syncthing
 Terminal=false
 Type=Application
--- a/etc/linux-runit/run
+++ b/etc/linux-runit/run
@@ -5,5 +5,4 @@ export HOME="/home/$USERNAME"
 export SYNCTHING="$HOME/bin/syncthing"

 exec 2>&1
-exec chpst -u "$USERNAME" "$SYNCTHING" -logflags 0
-
+exec chpst -u "$USERNAME" "$SYNCTHING" serve --logflags 0
--- a/etc/linux-sysctl/30-syncthing.conf
+++ b/etc/linux-sysctl/30-syncthing.conf
@@ -0,0 +1,3 @@
+# Increase maximum receive socket buffer size to 2MiB for QUIC connections
+# see https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
+net.core.rmem_max = 2097152
--- a/etc/linux-sysctl/README.md
+++ b/etc/linux-sysctl/README.md
@@ -0,0 +1,21 @@
+sysctl configuration to raise UDP buffer size
+===================
+Installation
+-----------
+**Please note:** When you installed syncthing using the official deb package, you can skip the copying.
+
+Copy the file `30-syncthing.conf` to `/etc/sysctl.d/` (root permissions required).
+
+In a terminal run
+```
+sudo sysctl -q --system
+```
+to apply the sysctl changes.
+
+
+Verification
+----------
+You can verify that the new limit is active using
+```
+sysctl net.core.rmem_max
+```
--- a/etc/linux-systemd/system/syncthing@.service
+++ b/etc/linux-systemd/system/syncthing@.service
@@ -2,11 +2,14 @@
 Description=Syncthing - Open Source Continuous File Synchronization for %I
 Documentation=man:syncthing(1)
 After=network.target
+StartLimitIntervalSec=60
+StartLimitBurst=4

 [Service]
 User=%i
-ExecStart=/usr/bin/syncthing -no-browser -no-restart -logflags=0
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
+RestartSec=1
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4

--- a/etc/linux-systemd/user/syncthing.service
+++ b/etc/linux-systemd/user/syncthing.service
@@ -1,10 +1,13 @@
 [Unit]
 Description=Syncthing - Open Source Continuous File Synchronization
 Documentation=man:syncthing(1)
+StartLimitIntervalSec=60
+StartLimitBurst=4

 [Service]
-ExecStart=/usr/bin/syncthing -no-browser -no-restart -logflags=0
+ExecStart=/usr/bin/syncthing serve --no-browser --no-restart --logflags=0
 Restart=on-failure
+RestartSec=1
 SuccessExitStatus=3 4
 RestartForceExitStatus=3 4

--- a/go.mod
+++ b/go.mod
@@ -1,58 +1,57 @@
 module github.com/syncthing/syncthing

 require (
-	github.com/AudriusButkevicius/pfilter v0.0.0-20190627213056-c55ef6137fc6
-	github.com/AudriusButkevicius/recli v0.0.5
-	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect
+	github.com/AudriusButkevicius/pfilter v0.0.10
+	github.com/AudriusButkevicius/recli v0.0.6
+	github.com/alecthomas/kong v0.2.16
 	github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e
 	github.com/calmh/xdr v1.1.0
-	github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d
-	github.com/certifi/gocertifi v0.0.0-20190905060710-a5e0173ced67 // indirect
+	github.com/ccding/go-stun v0.1.3
+	github.com/certifi/gocertifi v0.0.0-20210429200110-83314bf6d27c // indirect
 	github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5
+	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/d4l3k/messagediff v1.2.1
+	github.com/dchest/siphash v1.2.2
 	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568
 	github.com/getsentry/raven-go v0.2.0
-	github.com/go-ole/go-ole v1.2.4 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.3 // indirect
+	github.com/go-ldap/ldap/v3 v3.3.0
 	github.com/gobwas/glob v0.2.3
-	github.com/gogo/protobuf v1.3.1
-	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6
-	github.com/golang/mock v1.3.1 // indirect
-	github.com/jackpal/gateway v1.0.5
+	github.com/gogo/protobuf v1.3.2
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da
+	github.com/golang/protobuf v1.5.2
+	github.com/greatroar/blobloom v0.7.0
+	github.com/hashicorp/golang-lru v0.5.4
+	github.com/jackpal/gateway v1.0.7
 	github.com/jackpal/go-nat-pmp v1.0.2
+	github.com/julienschmidt/httprouter v1.3.0
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/lib/pq v1.2.0
-	github.com/lucas-clemente/quic-go v0.12.1
-	github.com/maruel/panicparse v1.3.0
-	github.com/mattn/go-isatty v0.0.11
-	github.com/minio/sha256-simd v0.1.1
-	github.com/onsi/ginkgo v1.9.0 // indirect
-	github.com/onsi/gomega v1.6.0 // indirect
-	github.com/oschwald/geoip2-golang v1.4.0
+	github.com/klauspost/cpuid/v2 v2.0.6 // indirect
+	github.com/lib/pq v1.10.1
+	github.com/lucas-clemente/quic-go v0.22.0
+	github.com/maruel/panicparse v1.6.1
+	github.com/maxbrunsfeld/counterfeiter/v6 v6.3.0
+	github.com/minio/sha256-simd v1.0.0
+	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75
+	github.com/oschwald/geoip2-golang v1.5.0
 	github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.2.1
-	github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563
+	github.com/prometheus/client_golang v1.10.0
+	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sasha-s/go-deadlock v0.2.0
-	github.com/shirou/gopsutil v0.0.0-20190714054239-47ef3260b6bf
-	github.com/spaolacci/murmur3 v1.1.0 // indirect
-	github.com/syncthing/notify v0.0.0-20190709140112-69c7a957d3e2
-	github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d
-	github.com/thejerf/suture v3.0.2+incompatible
-	github.com/urfave/cli v1.22.2
+	github.com/shirou/gopsutil/v3 v3.21.4
+	github.com/syncthing/notify v0.0.0-20210308121556-f45149b04939
+	github.com/syndtr/goleveldb v1.0.1-0.20200815071216-d9e9293bd0f7
+	github.com/thejerf/suture/v4 v4.0.1
+	github.com/urfave/cli v1.22.5
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
-	github.com/willf/bitset v1.1.10 // indirect
-	github.com/willf/bloom v2.0.3+incompatible
-	golang.org/x/crypto v0.0.0-20190829043050-9756ffdc2472
-	golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297
-	golang.org/x/text v0.3.2
-	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
-	gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
-	gopkg.in/ldap.v2 v2.5.1
+	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97
+	golang.org/x/net v0.0.0-20210716203947-853a461950ff
+	golang.org/x/sys v0.0.0-20210819135213-f52c844e1c1c
+	golang.org/x/text v0.3.6
+	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
+	golang.org/x/tools v0.1.5
 )

-go 1.13
-
-// https://github.com/spaolacci/murmur3/pull/30
-replace github.com/spaolacci/murmur3 v1.1.0 => github.com/calmh/murmur3 v1.1.1-0.20200226160057-74e9af8f47ac
+go 1.14
--- a/go.sum
+++ b/go.sum
@@ -1,276 +1,729 @@
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+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
+honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
+sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
+sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
--- a/gui/default/assets/css/overrides.css
+++ b/gui/default/assets/css/overrides.css
@@ -21,7 +21,7 @@ ul+h5 {
    margin-top: 1.5em;
 }

-#content {
+.content {
    margin-bottom: 50px;
 }

@@ -41,6 +41,12 @@ ul+h5 {
    float: none; /* issue #1197 */
 }

+#advancedAccordion input.form-control[type="checkbox"] {
+    box-shadow: none;
+    margin: 0;
+    width: auto;
+}
+
 .popover {
    max-width: none;
    min-width: 250px;
@@ -114,7 +120,8 @@ table.table-dynamic {
    word-break: break-all;
 }

-table.table-condensed td {
+table.table-condensed td,
+table.table-condensed th {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
@@ -136,6 +143,11 @@ table.table-auto td {
    max-width: 0px;
 }

+/* Wrap long file paths to prevent text overflow. See issue #6268. */
+.file-path {
+    word-break: break-all;
+}
+
 .folder-advanced {
    padding: 1rem;
    margin-bottom: 15px;
@@ -236,6 +248,7 @@ identicon {
 .identicon {
    width: 1em;
    height: 1em;
+    shape-rendering: crispEdges;
 }

 a.toggler {
@@ -351,7 +364,8 @@ ul.three-columns li, ul.two-columns li {
        overflow-y: scroll;
    }

-    table.table-condensed td {
+    table.table-condensed td,
+    table.table-condensed th {
        /* for mobile phones to allow linebreaks in long repro folder/shared with
        * columns. */
        white-space: normal;
@@ -415,3 +429,23 @@ ul.three-columns li, ul.two-columns li {
        margin-bottom: 1rem;
    }
 }
+
+.form-horizontal .form-group {
+    margin-bottom: 5px;
+}
+
+.form-horizontal {
+    margin-bottom: 10px;
+}
+
+/* Use the same style as Bootstrap uses for disabled <select>. */
+.form-control option[disabled] {
+    background-color: #eeeeee;
+    opacity: 1;
+}
+
+/* Make a "well" look more like a readonly text input when grouped with a button */
+.input-group .well-sm {
+  padding-top: 6px;
+  padding-bottom: 6px;
+}
--- a/gui/default/assets/lang/lang-bg.json
+++ b/gui/default/assets/lang/lang-bg.json
@@ -1,405 +1,442 @@
 {
-    "A device with that ID is already added.": "Устройство с този идентификатор е вече добавено.",
-    "A negative number of days doesn't make sense.": "Няма логика в задаването на отрицателен брой дни.",
-    "A new major version may not be compatible with previous versions.": "Нова основна версия, която може да не е съвместима с предишни версии.",
-    "API Key": "API Ключ",
-    "About": "За програмата",
+    "A device with that ID is already added.": "Устройство с този идентификатор вече е добавено.",
+    "A negative number of days doesn't make sense.": "Отрицателният брой дни е безсмислен.",
+    "A new major version may not be compatible with previous versions.": "Ново значимо издание, което може да е несъвместимо с предните издания.",
+    "API Key": "Ключ за ППИ",
+    "About": "Относно",
    "Action": "Действие",
-    "Actions": "Меню",
-    "Add": "Добави",
-    "Add Device": "Добави устройство",
-    "Add Folder": "Добави папка",
-    "Add Remote Device": "Добави ново устройство",
-    "Add devices from the introducer to our device list, for mutually shared folders.": "Добавяне на нови устройства през устройства предлагащи други устройства, за взаимно споделени папки.",
-    "Add new folder?": "Добави нова папка?",
-    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "Също така интервалът за повторно сканиране ще бъде увеличен (60 пъти, пр. новият интервал бъде 1ч). Освен това може да го зададете и ръчно за всяка папка след като изберете Не.",
+    "Actions": "Действия",
+    "Add": "Добавяне",
+    "Add Device": "Добавяне на устройство",
+    "Add Folder": "Добавяне на папка",
+    "Add Remote Device": "Добавяне на устройство",
+    "Add devices from the introducer to our device list, for mutually shared folders.": "Добавяйте устройства през поръчителите за взаимно споделени папки.",
+    "Add new folder?": "Добавяне на тази папка?",
+    "Additionally the full rescan interval will be increased (times 60, i.e. new default of 1h). You can also configure it manually for every folder later after choosing No.": "Също така интервалът за повторно обхождане ще бъде увеличен (60 пъти, пр. новият интервал бъде 1ч). Освен това може да го зададете и ръчно за всяка папка след като изберете Не.",
    "Address": "Адрес",
    "Addresses": "Адреси",
-    "Advanced": "Допълнителни",
-    "Advanced Configuration": "Допълнителни настройки",
-    "Advanced settings": "Допълнителни настройки",
+    "Advanced": "Разширени",
+    "Advanced Configuration": "Разширени настройки",
    "All Data": "Всички данни",
-    "Allow Anonymous Usage Reporting?": "Разрешаване изпращането на анонимни статистически данни?",
+    "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.": "Всички, споделени с това устройство папки трябва да бъдат защитени с парола, за да може данните да са недостъпни без нея.",
+    "Allow Anonymous Usage Reporting?": "Разрешаване на анонимното отчитане на употребата?",
    "Allowed Networks": "Разрешени мрежи",
    "Alphabetic": "Азбучен ред",
-    "An external command handles the versioning. It has to remove the file from the shared folder.": "Друга команда се занимава с версиите. Тази команда трябва да премахне файла от синхронизираната папка.",
-    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Външна команда се занимава с версиите. Тази команда трябва да премахне файла от синхронизираната папка. Ако пътят до това приложение използва интервали, то той трябва да бъде заграден в кавички.",
-    "An external command handles the versioning. It has to remove the file from the synced folder.": "Друга команда се занимава с версиите. Тази команда трябва да премахни файла от синхронизираната папка.",
-    "Anonymous Usage Reporting": "Анонимен доклад",
-    "Anonymous usage report format has changed. Would you like to move to the new format?": "Форматът на анонимния доклад е променен. Желаете ли да преминете към новия формат?",
-    "Any devices configured on an introducer device will be added to this device as well.": "Устройства настроени да представят други устройства също ще бъдат добавени към това устройство.",
-    "Are you sure you want to remove device {%name%}?": "Сигурни ли сте, че искате да премахнете устройството {{name}}?",
-    "Are you sure you want to remove folder {%label%}?": "Сигурни ли сте, че искате да премахнете папката {{label}}?",
-    "Are you sure you want to restore {%count%} files?": "Сигурни ли сте, че искате да възстановите файла {{count}}?",
-    "Are you sure you want to upgrade?": "Are you sure you want to upgrade?",
+    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Външна команда управлява версиите. Тя трябва да премахне файла от синхронизираната папка. Ако в пътя до приложението има интервали, то той трябва да бъде поставен в кавички.",
+    "Anonymous Usage Reporting": "Анонимно отчитане на употреба",
+    "Anonymous usage report format has changed. Would you like to move to the new format?": "Форматът на данните за анонимно отчитане на употреба е променен. Желаете ли да използвате него вместо стария?",
+    "Are you sure you want to continue?": "Сигурни ли сте, че желаете да продължите?",
+    "Are you sure you want to override all remote changes?": "Are you sure you want to override all remote changes?",
+    "Are you sure you want to permanently delete all these files?": "Сигурни ли сте, че желаете всички тези файлове да бъдат безвъзвратно премахнати?",
+    "Are you sure you want to remove device {%name%}?": "Сигурни ли сте, че желаете устройството {{name}} да бъде премахнато?",
+    "Are you sure you want to remove folder {%label%}?": "Сигурни ли сте, че желаете папката {{label}} да бъде премахната?",
+    "Are you sure you want to restore {%count%} files?": "Сигурни ли сте, че желаете {{count}} файла да бъде възстановени?",
+    "Are you sure you want to revert all local changes?": "Are you sure you want to revert all local changes?",
+    "Are you sure you want to upgrade?": "Желаете ли приложението да бъде обновено?",
    "Auto Accept": "Автоматично приемане",
-    "Automatic Crash Reporting": "Automatic Crash Reporting",
-    "Automatic upgrade now offers the choice between stable releases and release candidates.": "Автоматичното обновяване вече предлага избор между стабилни версии и кандидат версии.",
+    "Automatic Crash Reporting": "Автоматично изпращане на доклад за срив",
+    "Automatic upgrade now offers the choice between stable releases and release candidates.": "Автоматичното обновяване вече предлага избор между стабилни и предварителни издания.",
    "Automatic upgrades": "Автоматично обновяване",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
-    "Automatically create or share folders that this device advertises at the default path.": "Автоматично създаване или споделяне на папки, които това устройство предлага в пътя по подразбиране.",
-    "Available debug logging facilities:": "Дебъгинг функционалност на разположение:",
+    "Automatic upgrades are always enabled for candidate releases.": "Автоматичното обновяване е винаги включено за предварителните издания.",
+    "Automatically create or share folders that this device advertises at the default path.": "Автоматично създава в подразбираната папка или споделя папките, които устройството предлага.",
+    "Available debug logging facilities:": "Достъпни улеснения при отстраняване на дефекти:",
    "Be careful!": "Внимание!",
-    "Bugs": "Бъгове",
-    "CPU Utilization": "Използван процесор",
-    "Changelog": "Списък с промени",
-    "Clean out after": "Изчисти след",
-    "Click to see discovery failures": "Натиснете, за да видите грешки при откриването",
-    "Close": "Затвори",
+    "Bugs": "Дефекти",
+    "Cancel": "Отказ",
+    "Changelog": "Дневник на промените",
+    "Clean out after": "Почистване след",
+    "Cleaning Versions": "Cleaning Versions",
+    "Cleanup Interval": "Интервал на почистване",
+    "Click to see discovery failures": "Преглед на грешки при откриване",
+    "Click to see full identification string and QR code.": "Преглед на идентификатор и код за QR.",
+    "Close": "Затваряне",
    "Command": "Команда",
-    "Comment, when used at the start of a line": "Коментар, използван в началото на реда",
+    "Comment, when used at the start of a line": "Коментар, когато се използва в началото на реда",
    "Compression": "Компресиране",
    "Configured": "Настроен",
-    "Connection Error": "Грешка при свързването",
-    "Connection Type": "Вид връзка",
+    "Connected (Unused)": "Свързано (неизползвано)",
+    "Connection Error": "Грешка при осъществяване на връзка",
+    "Connection Type": "Connection Type",
    "Connections": "Връзки",
-    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Постоянния мониторинг за промени вече е част от Syncthing. При промени по файловете се стартира сканиране само за променените папки. Ползите са, че промените биват синхронизирани по-бързо, без да се изисква цялостно сканирания на папките.",
-    "Copied from elsewhere": "Копиране от някъде другаде",
-    "Copied from original": "Копиран от оригинала",
-    "Copyright © 2014-2016 the following Contributors:": "Всички правата запазени © 2014-2016 Сътрудници:",
-    "Copyright © 2014-2017 the following Contributors:": "Всички правата запазени © 2014-2017. Сътрудници:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
-    "Creating ignore patterns, overwriting an existing file at {%path%}.": "Създаване на шаблони за игнориране, презаписване на съществуващ файл в {{path}}.",
-    "Currently Shared With Devices": "Currently Shared With Devices",
+    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Syncthing вече разполага с постоянно наблюдение за промени. Така се забелязват промените на дисковото устройство и се обхождат само променените папки. Ползите са, че промените се разпространяват по-бързо и с по-малко на брой пълни обхождания.",
+    "Copied from elsewhere": "Копирано от някъде другаде",
+    "Copied from original": "Копирано от оригинала",
+    "Copyright © 2014-2019 the following Contributors:": "Всички права запазени © 2014-2019 за следните сътрудници:",
+    "Creating ignore patterns, overwriting an existing file at {%path%}.": "При създаване на шаблони за пренебрегване, съществуващият файл „{{path}}“ ще бъде презаписан.",
+    "Currently Shared With Devices": "Устройства, с които е споделена",
    "Danger!": "Опасност!",
-    "Debugging Facilities": "Дебъг функционалност",
+    "Debugging Facilities": "Отстраняване на дефекти",
+    "Default Configuration": "Настройки по подразбиране",
+    "Default Device": "Устройство по подразбиране",
+    "Default Folder": "Папка по подразбиране",
    "Default Folder Path": "Път до папка по подразбиране",
+    "Defaults": "Подразбирани",
+    "Delete": "Изтрий",
+    "Delete Unexpected Items": "Премахване на неочакваните",
    "Deleted": "Изтрито",
-    "Deselect All": "Никое",
-    "Deselect devices to stop sharing this folder with.": "Deselect devices to stop sharing this folder with.",
+    "Deselect All": "Изчистване",
+    "Deselect devices to stop sharing this folder with.": "Махнете отметката от устройство, за да спрете споделяне с него.",
+    "Deselect folders to stop sharing with this device.": "Махнете отметката от папка, за да спрете споделяне устройствто.",
    "Device": "Устройство",
    "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Устройство \"{{name}}\" ({{device}}) с адрес {{address}} желае да се свърже. Да бъде ли добавено?",
    "Device ID": "Идентификатор на устройство",
-    "Device Identification": "Идентификатор на устройството",
+    "Device Identification": "Идентификатор на устройство",
    "Device Name": "Име на устройството",
-    "Device rate limits": "Device rate limits",
+    "Device is untrusted, enter encryption password": "Устройството е недоверено, въведете парола за шифроване",
+    "Device rate limits": "Ограничаване на скоростта",
    "Device that last modified the item": "Устройство, което последно промени обекта",
    "Devices": "Устройства",
-    "Disable Crash Reporting": "Disable Crash Reporting",
+    "Disable Crash Reporting": "Изключване на доклада за срив",
    "Disabled": "Деактивирано",
-    "Disabled periodic scanning and disabled watching for changes": "Периодичните сканирания и наблюденията за промяна са деактивирани.",
-    "Disabled periodic scanning and enabled watching for changes": "Периодичните сканирания са деактивирани , а наблюденията за промяна са активирани.",
-    "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Периодичните сканирания са деактивирани и задаването на наблюдение за промени е неуспешно, ще опита пак след 1мин:",
-    "Discard": "Discard",
+    "Disabled periodic scanning and disabled watching for changes": "Изключено периодично обхождане и изключено наблюдение за промени",
+    "Disabled periodic scanning and enabled watching for changes": "Изключено периодично обхождане и включено наблюдение за промени",
+    "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Изключено периодично обхождане и грешка при започване на наблюдението за промени, прави се опит всяка минута:",
+    "Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).": "Изключва сравняването и синхронизацията на правата на файловете. Полезно за системи с липсващи или специфични права (като FAT, exFAT, Synology, Android).",
+    "Discard": "Отказване",
    "Disconnected": "Не е свързано",
+    "Disconnected (Unused)": "Не е свързано (неизползвано)",
    "Discovered": "Открит",
    "Discovery": "Откриване",
-    "Discovery Failures": "Грешка в откриването",
-    "Do not restore": "Не възстановявай",
-    "Do not restore all": "Не възстановявай всички",
-    "Do you want to enable watching for changes for all your folders?": "Желаете ли да активирате наблюдението за промени на всички папки?",
+    "Discovery Failures": "Грешка при откриване",
+    "Discovery Status": "Състояние на откриване",
+    "Dismiss": "Отхвърляне",
+    "Do not add it to the ignore list, so this notification may recur.": "Да не бъде добавяна в списъка за пренебрегване, така че да има повторно запитване.",
+    "Do not restore": "Без възстановяване",
+    "Do not restore all": "Без възстановяване всички",
+    "Do you want to enable watching for changes for all your folders?": "Желаете ли да наблюдението за промени да бъде включено за всички папки?",
    "Documentation": "Документация",
-    "Download Rate": "Скорост на сваляне",
+    "Download Rate": "Скорост на изтегляне",
    "Downloaded": "Изтеглен",
    "Downloading": "Изтегляне",
-    "Edit": "Промени",
-    "Edit Device": "Промяна на устройството",
-    "Edit Folder": "Промяна на папката",
-    "Editing": "Променяне",
+    "Edit": "Редактиране",
+    "Edit Device": "Промяна на устройство",
+    "Edit Device Defaults": "За нови устройства",
+    "Edit Folder": "Промяна на папка",
+    "Edit Folder Defaults": "За нови папки",
    "Editing {%path%}.": "Променяне на {{path}}.",
-    "Enable Crash Reporting": "Enable Crash Reporting",
-    "Enable NAT traversal": "Разреши NAT traversal",
-    "Enable Relaying": "Разреши препращане",
-    "Enabled": "Активирано",
-    "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Въведете не отрицателно число (пр. \"2.35\") и изберете единица.\nПроцентите са като част от размера на цялото дисково пространство.",
-    "Enter a non-privileged port number (1024 - 65535).": "Въведете непривилегирован номер на порт (1024-65535).",
-    "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Въведете адреси разделени със запетая (\"tcp://ip:port\", \"tcp://host:port\") или \"dynamic\", за автоматично откриване на наличните адреси.",
-    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Въведете адреси разделени със запетая (\"tcp://ip:port\", \"tcp://host:port\") или \"dynamic\", за автоматично откриване на наличните адреси.",
-    "Enter ignore patterns, one per line.": "Добавете шаблони за игнориране, по един на ред.",
-    "Enter up to three octal digits.": "Enter up to three octal digits.",
+    "Enable Crash Reporting": "Включване на доклад за срив",
+    "Enable NAT traversal": "Преминаване през NAT",
+    "Enable Relaying": "Ретранслация",
+    "Enabled": "Включено",
+    "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Въведете положително число (например „3.14“) и изберете единица мярка. Процентите са части от цялото дисково пространство.",
+    "Enter a non-privileged port number (1024 - 65535).": "Въведете номер на непривилегирован порт (1024-65535).",
+    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Въведете адреси, разделени със запетая („tcp://ip:port“, „tcp://host:port“) или „dynamic“, за автоматично откриване на наличните адреси.",
+    "Enter ignore patterns, one per line.": "Въведете шаблони за пренебрегване, по един на ред.",
+    "Enter up to three octal digits.": "Въведете до три осмични цифри.",
    "Error": "Грешка",
-    "External File Versioning": "Външно управление на версиите",
-    "Failed Items": "Неуспешни",
-    "Failed to load ignore patterns": "Неуспешно зареждане на шаблони за игнориране",
-    "Failed to setup, retrying": "Неуспешно конфигуриране, правенe на повторен опит",
-    "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "Неуспешна връзка към IPv6 сървъри може да се очаква ако няма IPv6 свързаност.",
-    "File Pull Order": "Ред на сваляне",
+    "External File Versioning": "Външно управление на версии",
+    "Failed Items": "Failed Items",
+    "Failed to load ignore patterns.": "Грешка при зареждане на шаблони за пренебрегване.",
+    "Failed to setup, retrying": "Грешка при настройване, извършва се повторен опит",
+    "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "Неуспешна връзка към сървъри на IPv6 може да се очаква ако няма свързаност по IPv6.",
+    "File Pull Order": "Ред на изтегляне",
    "File Versioning": "Версии на файловете",
-    "File permission bits are ignored when looking for changes. Use on FAT file systems.": "Битовете за права за достъп ще бъдат игнорирани, когато се проверява за промени. Ползвайте за файлови системи тип FAT.",
-    "Files are moved to .stversions directory when replaced or deleted by Syncthing.": "Файловете биват преместени в .stversions папка, когато са заменени или изтрити от Syncthing.",
-    "Files are moved to .stversions folder when replaced or deleted by Syncthing.": "Файловете биват преместени в .stversions папка, когато са заменени или изтрити от Syncthing.",
-    "Files are moved to date stamped versions in a .stversions directory when replaced or deleted by Syncthing.": "Когато Syncthing замени или изтрие файл той бива преместен в папката .stversions и преименуван - с добавяне на дата и час.",
-    "Files are moved to date stamped versions in a .stversions folder when replaced or deleted by Syncthing.": "Когато Syncthing замени или изтрие файл той бива преместен в папката .stversions и преименуван - с добавяне на дата и час.",
-    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "Защитава локалните файловете от промени направени на други устройства, но промените направени на това устройство ще бъдат синхронизирани с останалите устройства.",
-    "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.": "Промените направени на други устройства ще бъдат прилагани локално, но локалните промени няма да бъдат синхронизирани с останалите устройства.",
-    "Filesystem Notifications": "Известия на системата",
-    "Filesystem Watcher Errors": "Filesystem Watcher Errors",
+    "Files are moved to .stversions directory when replaced or deleted by Syncthing.": "Файловете биват преместени в папка .stversions при заменяне или изтриване от Syncthing.",
+    "Files are moved to date stamped versions in a .stversions directory when replaced or deleted by Syncthing.": "Когато Syncthing замени или изтрие файл той бива преместен в папката .stversions и преименуван - с добавяне на датата и часа.",
+    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "Предпазва местните файлове от промени, идващи от другите устройства, но местните промени се изпращат.",
+    "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.": "Файловете се синхронизират от другите устройства, но местните промени не се изпращат.",
+    "Filesystem Watcher Errors": "Грешка при наблюдаване на файловата система",
    "Filter by date": "Филтриране по дата",
    "Filter by name": "Филтриране по име",
    "Folder": "Папка",
    "Folder ID": "Идентификатор на папката",
    "Folder Label": "Име на папката",
    "Folder Path": "Път до папката",
-    "Folder Type": "Вид папка",
+    "Folder Type": "Вид на папката",
+    "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Вида „{{receiveEncrypted}}“ може да бъде избран само при добавяне на папка.",
+    "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Folder type \"{{receiveEncrypted}}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.",
    "Folders": "Папки",
-    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.",
-    "Full Rescan Interval (s)": "Интервал(и) за периодичното сканиране",
-    "GUI": "Потребителски интерфейс",
+    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Грешка при започване на наблюдението за промени на следните папки. Всяка минута ще бъде извършван нов опит, така че грешката скоро може да изчезне. Ако все пак не изчезне, отстранете нейната първопричина или потърсете помощ ако не съумявате.",
+    "Full Rescan Interval (s)": "Интервал на пълно обхождане (секунди)",
+    "GUI": "Графичен интерфейс",
    "GUI Authentication Password": "Парола за интерфейса",
    "GUI Authentication User": "Потребител за интерфейса",
-    "GUI Listen Address": "Адрес на слушане на GUI-то",
-    "GUI Listen Addresses": "Адрес за свързване с потребителския интерфейс",
-    "GUI Theme": "Тема за потребителския интерфейс",
+    "GUI Authentication: Set User and Password": "Удостоверяване графичен интерфейс: потребител и парола",
+    "GUI Listen Address": "Адрес на слушане",
+    "GUI Theme": "Тема на графичния интерфейс",
    "General": "Общи",
-    "Generate": "Генерирай",
-    "Global Changes": "Глобални промени",
+    "Generate": "Подновяване",
    "Global Discovery": "Глобално откриване",
    "Global Discovery Servers": "Сървъри за глобално откриване",
    "Global State": "Глобално състояние",
    "Help": "Помощ",
-    "Home page": "Начална страница",
+    "Home page": "Страница",
    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.",
-    "Ignore": "Игнорирай",
-    "Ignore Patterns": "Шаблони за игнориране",
-    "Ignore Permissions": "Игнорирай правата за достъп",
-    "Ignored Devices": "Игнорирани устройства",
-    "Ignored Folders": "Игнорирани папки",
-    "Ignored at": "Ignored at",
-    "Incoming Rate Limit (KiB/s)": "Лимит на скоростта за сваляне (KiB/s)",
+    "Identification": "Идентификация",
+    "If untrusted, enter encryption password": "При недоверено задайте парола за шифроване",
+    "If you want to prevent other users on this computer from accessing Syncthing and through it your files, consider setting up authentication.": "Ако желаете да предотвратите достъпа на другите потребители на устройството до Syncthing, а чрез него и до файловете ви, помислете за удостоверяване на графичния интерфейс.",
+    "Ignore": "Пренебрегване",
+    "Ignore Patterns": "Шаблони за пренебрегване",
+    "Ignore Permissions": "Пренебрегване на права",
+    "Ignored Devices": "Пренебрегнати устройства",
+    "Ignored Folders": "Пренебрегнати папки",
+    "Ignored at": "Пренебрегнато на",
+    "Incoming Rate Limit (KiB/s)": "Ограничение при изтегляне (KiB/s)",
    "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Неправилни настройки могат да повредят файлове и да попречат на синхронизирането.",
    "Introduced By": "Предложено от",
-    "Introducer": "Може да предлага други устройства",
-    "Inversion of the given condition (i.e. do not exclude)": "Обратното на даденото условие (пр. не изключвай)",
-    "Keep Versions": "Пази версии",
-    "Largest First": " Първо най-големите",
-    "Last File Received": "Последния получен файл",
-    "Last Scan": "Последно сканирана",
+    "Introducer": "Поръчител",
+    "Inversion of the given condition (i.e. do not exclude)": "Обръща значението на условието (напр. да не се отхвърля)",
+    "Keep Versions": "Пазени версии",
+    "LDAP": "LDAP",
+    "Largest First": " Първо най-големи",
+    "Last Scan": "Последно обхождане",
    "Last seen": "Последно видяно",
-    "Later": "По-късно",
    "Latest Change": "Последна промяна",
    "Learn more": "Научете повече",
-    "Limit": "Limit",
-    "Listeners": "Синхронизиращи устройства",
+    "Limit": "Ограничение",
+    "Listener Failures": "Грешки при очакване на връзка",
+    "Listener Status": "Очакване на връзка",
+    "Listeners": "Очакване на връзка",
    "Loading data...": "Зареждане на информация...",
    "Loading...": "Зареждане...",
-    "Local Additions": "Local Additions",
-    "Local Discovery": "Локално откриване",
-    "Local State": "Локално състояние",
-    "Local State (Total)": "Локално състояние (общо)",
-    "Locally Changed Items": "Locally Changed Items",
-    "Log": "Доклад",
-    "Log tailing paused. Click here to continue.": "Докладът е замразен. Натиснете, за да продължите.",
-    "Log tailing paused. Scroll to bottom continue.": "Log tailing paused. Scroll to bottom continue.",
-    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
-    "Logs": "Доклади",
-    "Major Upgrade": "Основно Обновяване",
-    "Mass actions": "Действия за всички",
-    "Master": "Главен",
+    "Local Additions": "Местно добавени",
+    "Local Discovery": "Месно откриване",
+    "Local State": "Местно състояние",
+    "Local State (Total)": "Местно състояние (общо)",
+    "Locally Changed Items": "Местно променени",
+    "Log": "Дневник",
+    "Log tailing paused. Scroll to the bottom to continue.": "Добавяне на редове към дневника е спряно. Плъзнете най-долу за да продължи.",
+    "Logs": "Дневници",
+    "Major Upgrade": "Обновяване на значимо издание",
+    "Mass actions": "Мащабни действия",
    "Maximum Age": "Максимална възраст",
    "Metadata Only": "Само мета информация",
    "Minimum Free Disk Space": "Минимално свободно дисково пространство",
    "Mod. Device": "Променящо устройство",
    "Mod. Time": "Дата на промяна",
-    "Move to top of queue": "Премести в началото на опашката",
-    "Multi level wildcard (matches multiple directory levels)": "Маска на много нива (покрива папки с много нива)",
+    "Move to top of queue": "Преместване отпред на опашката",
+    "Multi level wildcard (matches multiple directory levels)": "Заместващ символ за няколко нива (съвпада с папки, вложени на няколко нива)",
    "Never": "никога",
    "New Device": "Ново устройство",
    "New Folder": "Нова папка",
-    "Newest First": "Първо най-новите",
+    "Newest First": "Първо най-нови",
    "No": "Не",
-    "No File Versioning": "Без версии",
-    "No files will be deleted as a result of this operation.": "Няма да бъдат изтрити файлове като резултат от тази операция.",
-    "No upgrades": "Няма обновления",
-    "Normal": "Нормален",
+    "No File Versioning": "Без пазене на версии",
+    "No files will be deleted as a result of this operation.": "В резултат на операцията няма да бъдат премахнати файлове.",
+    "No upgrades": "Без обновяване",
+    "Not shared": "Не споделена",
    "Notice": "Известие",
-    "OK": "ОК",
+    "OK": "Добре",
    "Off": "Изключено",
-    "Oldest First": "Първо най-старите",
+    "Oldest First": "Първо най-стари",
    "Optional descriptive label for the folder. Can be different on each device.": "Незадължително име на папката. Може да бъде различно на всяко устройство.",
    "Options": "Настройки",
    "Out of Sync": "Несинхронизирано",
    "Out of Sync Items": "Несинхронизирани елементи",
-    "Outgoing Rate Limit (KiB/s)": "Лимит на скорост за качване (KiB/s)",
-    "Override Changes": "Наложи локалните промени",
+    "Outgoing Rate Limit (KiB/s)": "Ограничение при качване (KiB/s)",
+    "Override": "Налагане",
+    "Override Changes": "Налагане на местни промени",
    "Path": "Път",
-    "Path to the folder on the local computer. Will be created if it does not exist. The tilde character (~) can be used as a shortcut for": "Път до папката на това устройство. Ако не съществува ще бъде създадена. Символът тилда (~) може да бъде използван като заместител на",
-    "Path where new auto accepted folders will be created, as well as the default suggested path when adding new folders via the UI. Tilde character (~) expands to {%tilde%}.": "Къде да бъдат създавани, автоматично приети папки, както и предложението за път, при добавяне на нови папки от потребителският интерфейс. Символът тилда (~) ще бъде заменян с {{tilde}}.",
-    "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "Пътят, където версиите да бъдат складирани (оставете празно за папката .stversions).",
-    "Path where versions should be stored (leave empty for the default .stversions folder in the folder).": "Пътят, където версиите да бъдат складирани(остави празно за папката .stversions).",
+    "Path to the folder on the local computer. Will be created if it does not exist. The tilde character (~) can be used as a shortcut for": "Път до папката на това устройство. Ако не съществува ще бъде създадена. Символът тилда (~) може да бъде използван вместо",
+    "Path where new auto accepted folders will be created, as well as the default suggested path when adding new folders via the UI. Tilde character (~) expands to {%tilde%}.": "Къде да бъдат създавани, автоматично приетите папки, както и предложението за път, при добавяне на нови папки от графичния интерфейс. Символът тилда (~) ще бъде заменян с {{tilde}}.",
+    "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "Папка, в която да бъдат запазвани версиите (оставете празно за подразбираната директория .stversions в споделената папка).",
    "Pause": "Пауза",
    "Pause All": "Пауза на всички",
    "Paused": "На пауза",
-    "Pending changes": "Pending changes",
-    "Periodic scanning at given interval and disabled watching for changes": "Периодично сканиране, през определен интервал, без мониторинг за промени",
-    "Periodic scanning at given interval and enabled watching for changes": "Периодично сканиране, през определен интервал, и мониторинг за промени",
-    "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Периодично сканиране, през определен интервал, мониторинга за промени не може да стартира. Всяка минута минута се прави опит за стартиране:",
-    "Permissions": "Права за достъп",
-    "Please consult the release notes before performing a major upgrade.": "Моля прочети бележките по обновяването преди да започнеш.",
-    "Please set a GUI Authentication User and Password in the Settings dialog.": "Моля задайте потребителско име и парола за потребителския интерфейс в секцията Настройки.",
-    "Please wait": "Моля изчакайте",
-    "Prefix indicating that the file can be deleted if preventing directory removal": "Представка, която индикира, че файлът може да бъде изтрит ако пречи на премахването на папка",
-    "Prefix indicating that the pattern should be matched without case sensitivity": "Представка, която индикира, че шаблона няма да прави разлика между главни/малки букви",
-    "Preparing to Sync": "Preparing to Sync",
+    "Paused (Unused)": "На пауза (неизползвано)",
+    "Pending changes": "Незапазени промени",
+    "Periodic scanning at given interval and disabled watching for changes": "Периодично обхождане без наблюдение за промени",
+    "Periodic scanning at given interval and enabled watching for changes": "Периодично обхождане и наблюдение за промени",
+    "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Периодично обхождане и грешка при започване на наблюдението за промени, прави се опит всяка минута.",
+    "Permanently add it to the ignore list, suppressing further notifications.": "Добавяне за постоянно в списъка с пренебрегнати елементи, потискайки бъдещи известия.",
+    "Permissions": "Права",
+    "Please consult the release notes before performing a major upgrade.": "Прочетете бележките по изданието преди да пристъпите към обновяване към значимо издание.",
+    "Please set a GUI Authentication User and Password in the Settings dialog.": "Задайте потребителско име и парола за графичния интерфейс в настройките.",
+    "Please wait": "Изчакайте",
+    "Prefix indicating that the file can be deleted if preventing directory removal": "Представка, указваща че файлът може да бъде изтрит ако пречи при премахване на папката",
+    "Prefix indicating that the pattern should be matched without case sensitivity": "Представка, указваща че шаблонът не прави разлика в регистъра на буквите",
+    "Preparing to Sync": "Подготовка за синхронизация",
    "Preview": "Преглед",
-    "Preview Usage Report": "Преглед на статистиката",
-    "Quick guide to supported patterns": "Бърз наръчник към поддържаните шаблони",
-    "RAM Utilization": "Използванa RAM",
+    "Preview Usage Report": "Преглед на отчет за употреба",
+    "Quick guide to supported patterns": "Кратък наръчник на поддържаните шаблони",
    "Random": "Произволен",
-    "Receive Only": "Само получаване",
+    "Receive Encrypted": "Приема шифровани данни",
+    "Receive Only": "Само получава",
+    "Received data is already encrypted": "Получените данни вече са шифровани",
    "Recent Changes": "Последни промени",
-    "Reduced by ignore patterns": "Намалено посредством шаблон за игнориране",
-    "Release Notes": "Бележки по обновяването",
-    "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "Кандидат версиите съдържат най-новата функционалност и поправки. Те са близки до традиционните дву-седмични Synchthing обновления.",
-    "Remote Devices": "Устройства",
-    "Remove": "Премахни",
+    "Reduced by ignore patterns": "Наложени са шаблони за пренебрегване",
+    "Release Notes": "Бележки по изданието",
+    "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "Предварителните издания съдържат най-новите възможности и поправки. Те са близки до традиционните, два пъти в седмицата, издания на Synchthing.",
+    "Remote Devices": "Отдалечени устройства",
+    "Remote GUI": "Отдалечен графичен интерфейс",
+    "Remove": "Премахване",
    "Remove Device": "Премахване на устройство",
    "Remove Folder": "Премахване на папка",
-    "Required identifier for the folder. Must be the same on all cluster devices.": "Задължителен идентификатор за папката. Трябва да бъде един и същ на всяко устройство.",
-    "Rescan": "Сканирай",
-    "Rescan All": "Сканирай всички",
-    "Rescan Interval": "Интервал за повторно сканиране",
-    "Rescans": "Повторни сканирания",
-    "Restart": "Рестартирай",
+    "Required identifier for the folder. Must be the same on all cluster devices.": "Задължителен идентификатор на папката. Трябва е еднакъв на всички устройства.",
+    "Rescan": "Обхождане",
+    "Rescan All": "Обхождане всички",
+    "Rescans": "Обхождане",
+    "Restart": "Рестартиране",
    "Restart Needed": "Изисква се рестартиране",
    "Restarting": "Рестартиране",
    "Restore": "Възстановяване",
    "Restore Versions": "Възстановяване на версии",
-    "Resume": "Пусни",
-    "Resume All": "Пусни всички",
+    "Resume": "Възобновяване",
+    "Resume All": "Възобновяване всички",
    "Reused": "Повторно използван",
-    "Revert Local Changes": "Revert Local Changes",
-    "Running": "Изпълнява се",
-    "Save": "Запази",
-    "Scan Time Remaining": "Оставащо време за сканиране",
-    "Scanning": "Сканиране",
-    "See external versioner help for supported templated command line parameters.": "Прегледайте документацията на външното приложение за версии и поддържаните от него командни параметри. ",
-    "See external versioning help for supported templated command line parameters.": "Прегледайте външната документацията за поддържаните командни параметри. ",
+    "Revert": "Отменяне",
+    "Revert Local Changes": "Отменяне на местни промени",
+    "Save": "Запазване",
+    "Scan Time Remaining": "Оставащо време до обхождане",
+    "Scanning": "Обхождане",
+    "See external versioning help for supported templated command line parameters.": "Прочетете ръководството за външното управление на версии, за да се запознаете с шаблонните параметри.",
    "Select All": "Всички",
    "Select a version": "Изберете версия",
-    "Select additional devices to share this folder with.": "Select additional devices to share this folder with.",
-    "Select latest version": "Избор на най-новата версия",
-    "Select oldest version": "Избор на най-старата версия",
-    "Select the devices to share this folder with.": "Изберете устройствата, с които да споделите папката.",
-    "Select the folders to share with this device.": "Изберете папките за споделяне с това устройство.",
-    "Send & Receive": "Изпращане и получаване",
-    "Send Only": "Само изпращане",
+    "Select additional devices to share this folder with.": "Изберете други устройства, с които да споделите с папката.",
+    "Select additional folders to share with this device.": "Изберете други папки, които да споделите с устройството.",
+    "Select latest version": "Избиране на най-новата версия",
+    "Select oldest version": "Избиране на на най-старата версия",
+    "Select the folders to share with this device.": "Изберете папките, които да споделите с устройството.",
+    "Send & Receive": "Изпраща и получава",
+    "Send Only": "Само изпраща",
    "Settings": "Настройки",
-    "Share": "Сподели",
-    "Share Folder": "Сподели папка",
+    "Share": "Споделяне",
+    "Share Folder": "Споделяне на папка",
    "Share Folders With Device": "Споделяне на папки с устройството",
-    "Share With Devices": "Споделяне с устройства",
-    "Share this folder?": "Сподели тази папка?",
+    "Share this folder?": "Споделяне на папката?",
+    "Shared Folders": "Споделени папки",
    "Shared With": "Споделена с",
    "Sharing": "Споделяне",
-    "Show ID": "Покажи идентификатора",
-    "Show QR": "Покажи QR",
-    "Show diff with previous version": "Показване на разликите спрямо предната версия",
-    "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Показва се вместо идентификатора на устройството в статуса на клъстъра. Ще се ползва за представяне пред останалите устройства.",
-    "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Показва се вместо идентификатора на устройството в статуса на клъстъра. Ще бъде попълнено с името, с което се е представило устройството, ако оставите полето празно.",
-    "Shutdown": "Спри програмата",
+    "Show ID": "Идентификатор",
+    "Show QR": "Преглед на QR",
+    "Show detailed discovery status": "Подробно състояние на откриване",
+    "Show detailed listener status": "Подробно състояние на слушане",
+    "Show diff with previous version": "Показване на разликите с предходната версия",
+    "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "В списъка на устройствата се показва вместо идентификатор. Ще бъде предложено на другите устройства като име по подразбиране.",
+    "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "В списъка на устройствата се показва вместо идентификатор. Ако бъде оставено празно ще бъде променено на името, което носи устройството.",
+    "Shutdown": "Изключване",
    "Shutdown Complete": "Спирането завършено",
-    "Simple File Versioning": "Опростени версии",
-    "Single level wildcard (matches within a directory only)": "Маска на едно ниво (покрива само в папка)",
+    "Simple File Versioning": "Обикновени версии",
+    "Single level wildcard (matches within a directory only)": "Заместващ символ за едно ниво (съвпада само с папка)",
    "Size": "Размер",
-    "Smallest First": "Първо най-малките",
+    "Smallest First": "Първо най-малки",
+    "Some discovery methods could not be established for finding other devices or announcing this device:": "Някои методи за откриване не могат да бъдат използвани за намиране на други устройства или за обявяване на това устройство:",
    "Some items could not be restored:": "Някои елементи не могат да бъдат възстановени:",
-    "Source Code": "Сорс код",
-    "Stable releases and release candidates": "Стабилни версии и кандидати за стабилни версии",
-    "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "Стабилните версии са забавени с две седмици. През това време те преминават през тестване като бъдат кандидат версии.",
+    "Some listening addresses could not be enabled to accept connections:": "Някои от адресите, на които Syncthing очаква връзка не могат да бъдат настроени да получават входящи връзки.",
+    "Source Code": "Изходен код",
+    "Stable releases and release candidates": "Стабилни и предварителни издания",
+    "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "Стабилните издания биват забавяни с две седмици. През този период те преминават през изпитване като предварителни издания.",
    "Stable releases only": "Само стабилни версии",
-    "Staggered File Versioning": "Наслагващи се версии",
-    "Start Browser": "Стартирай браузъра",
+    "Staggered File Versioning": "Разпределени версии",
+    "Start Browser": "Отваряне в мрежов четец",
    "Statistics": "Статистика",
-    "Stopped": "Не се синхронизира",
+    "Stopped": "Спряна",
+    "Stores and syncs only encrypted data. Folders on all connected devices need to be set up with the same password or be of type \"{%receiveEncrypted%}\" too.": "Съхранява и синхронизира само шифровани данни. Папките на всички свързани устройства трябва да бъдат настроени със същата парола или също да са от вида „{{receiveEncrypted}}“.",
    "Support": "Помощ",
-    "Support Bundle": "Support Bundle",
-    "Sync Protocol Listen Addresses": "Адрес за слушане на синхронизиращия протокол",
+    "Support Bundle": "Архив за поддръжка",
+    "Sync Protocol Listen Addresses": "Адрес, на който слуша синхронизиращия протокол",
    "Syncing": "Синхронизиране",
-    "Syncthing has been shut down.": "Syncthing е спрян.",
+    "Syncthing has been shut down.": "Syncthing е изключен.",
    "Syncthing includes the following software or portions thereof:": "Syncthing уползотворява частично или изцяло следните софтуерни продукти:",
-    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing is Free and Open Source Software licensed as MPL v2.0.",
-    "Syncthing is restarting.": "Syncthing се рестартира",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing е свободен софтуер с отворен код, под лиценза на MPL v2.0.",
+    "Syncthing is listening on the following network addresses for connection attempts from other devices:": "Syncthing очаква опити за установяване на връзка от други устройства на следните мрежови адреси:",
+    "Syncthing is not listening for connection attempts from other devices on any address.  Only outgoing connections from this device may work.": "Syncthing не слуша за опити за установяване на връзка от други устройства. Вероятно работят само изходящите връзки от това устройство.",
+    "Syncthing is restarting.": "Syncthing се рестартира.",
    "Syncthing is upgrading.": "Syncthing се обновява.",
    "Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.": "Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.",
-    "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Изглежда, че Syncthing не е включен, или има проблем с връзката с Интернет. Повторен опит...",
-    "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing има проблем при обработването на заявката. Моля, презаредете браузъра или рестартирайте Syncthing ако проблемът продължи.",
-    "Take me back": "Take me back",
-    "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.": "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.",
+    "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Изглежда, че Syncthing не работи или няма достъп до интернет. Извършва се повторен опит…",
+    "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing има проблем при обработването на заявката. Презаредете страницата или рестартирайте Syncthing ако проблемът продължава да съществува.",
+    "Take me back": "Назад",
+    "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.": "Адресът на интерфейса не се взима под внимание заради параметри при стартиране. Промените тук няма да бъдат отразени докато параметрите не бъдат променени.",
+    "The Syncthing Authors": "Автори на Syncthing",
    "The Syncthing admin interface is configured to allow remote access without a password.": "Администраторският панел на Syncthing разрешава дистанционен достъп без да изисква парола.",
-    "The aggregated statistics are publicly available at the URL below.": "Обобщение на събраните статистически ще намерите на долния URL адрес.",
-    "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "Конфигурацията е запазена, но не е активирана. Syncthing трябва да рестартира, за да се активира новата конфигурация.",
+    "The aggregated statistics are publicly available at the URL below.": "Обобщените статистически данни са публично достъпни на адреса по-долу.",
+    "The cleanup interval cannot be blank.": "Интервалът на почистване не може да бъде празен.",
+    "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.",
    "The device ID cannot be blank.": "Полето идентификатор на устройство не може да бъде празно.",
-    "The device ID to enter here can be found in the \"Actions > Show ID\" dialog on the other device. Spaces and dashes are optional (ignored).": "Идентификатор на устройство за въвеждане тук, може да бъде намерен в \"Промени > Покажи идентификатора\" на другото устройство. Интервалите и тиретата са пожелание (биват прескачани).",
-    "The encrypted usage report is sent daily. It is used to track common platforms, folder sizes and app versions. If the reported data set is changed you will be prompted with this dialog again.": "Криптиран статистически доклад ще се изпраща ежедневно. Ползва се, за отичане на ползваните платформи, размер на папки и версии на приложението. При промяна в събираните данни, ще бъдете информирани от подобен на този прозорец.",
-    "The entered device ID does not look valid. It should be a 52 or 56 character string consisting of letters and numbers, with spaces and dashes being optional.": "Въведеният идентификатор на устройство не е валиден. Трябва да бъде 52 или 56 символа и да се състои от букви и цифри, като интервалите и тиретата са пожелание.",
-    "The first command line parameter is the folder path and the second parameter is the relative path in the folder.": "Първият параметър за командата е пътя до папката, а вторият е релативния път в самата папка.",
+    "The device ID to enter here can be found in the \"Actions > Show ID\" dialog on the other device. Spaces and dashes are optional (ignored).": "Идентификаторът на устройството, който да въведете се намира в „Действия > Идентификатор“. Интервалите и дефисите са незадължителни.",
+    "The encrypted usage report is sent daily. It is used to track common platforms, folder sizes and app versions. If the reported data set is changed you will be prompted with this dialog again.": "Шифрованият отчет за употреба се изпраща ежедневно. Използва се за отчитане на най-често срещаните платформи, размери на папки и издания на приложението. При промяна в събираните данни отново ще бъде поискано вашето съгласие.",
+    "The entered device ID does not look valid. It should be a 52 or 56 character string consisting of letters and numbers, with spaces and dashes being optional.": "Въведеният идентификатор на устройство не е валиден. Трябва да бъде 52 или 56 символа и да се състои от букви и цифри, като интервалите и дефисите са незадължителни.",
    "The folder ID cannot be blank.": "Полето идентификатор на папка не може да бъде празно.",
    "The folder ID must be unique.": "Идентификаторът на папката трябва да бъде уникален.",
+    "The folder content on other devices will be overwritten to become identical with this device. Files not present here will be deleted on other devices.": "The folder content on other devices will be overwritten to become identical with this device. Files not present here will be deleted on other devices.",
+    "The folder content on this device will be overwritten to become identical with other devices. Files newly added here will be deleted.": "The folder content on this device will be overwritten to become identical with other devices. Files newly added here will be deleted.",
    "The folder path cannot be blank.": "Пътят до папката не може да бъде празен.",
-    "The following intervals are used: for the first hour a version is kept every 30 seconds, for the first day a version is kept every hour, for the first 30 days a version is kept every day, until the maximum age a version is kept every week.": "Използва се следния интервал: за първия час се пази версия на всеки 30 секунди, за първия ден се пази версия на всеки час, за първите 30 дена се пази версия всеки ден, до максимума се пази една версия всяка седмица.",
+    "The following intervals are used: for the first hour a version is kept every 30 seconds, for the first day a version is kept every hour, for the first 30 days a version is kept every day, until the maximum age a version is kept every week.": "Използват се следните интервали: за първия час се пази версия на всеки 30 секунди, за първия ден - на всеки час, за първите 30 дена - всеки ден, до максимума се пази една версия всяка седмица.",
    "The following items could not be synchronized.": "Следните елементи не могат да бъдат синхронизирани.",
-    "The following items were changed locally.": "The following items were changed locally.",
+    "The following items were changed locally.": "Следните елементи са променени локално.",
+    "The following methods are used to discover other devices on the network and announce this device to be found by others:": "The following methods are used to discover other devices on the network and announce this device to be found by others:",
+    "The following unexpected items were found.": "Следните елементи са намерени, но не са очаквани.",
+    "The interval must be a positive number of seconds.": "Интервалът трябва да е положителен брой секунди.",
+    "The interval, in seconds, for running cleanup in the versions directory. Zero to disable periodic cleaning.": "Интервал, в секунди, на почистване на папката с версии. Нула изключва периодичното почистване.",
    "The maximum age must be a number and cannot be blank.": "Максималната възраст трябва да е число, полето не може да бъде празно.",
    "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "Максималното време за пазене на версия (в дни, задайте 0 за да не бъдат изтривани версии).",
-    "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "Минималното свободно дисково пространство в проценти трябва да е между 0 и 100 (включително).",
    "The number of days must be a number and cannot be blank.": "Броят дни трябва да бъде число и не може да бъде празно.",
-    "The number of days to keep files in the trash can. Zero means forever.": "Броят дни за запазване на файловете в кошчето. Нула значи завинаги.",
-    "The number of old versions to keep, per file.": "Броят стари версии, които да бъдат пазени за всеки файл.",
+    "The number of days to keep files in the trash can. Zero means forever.": "Брой дни за пазене на файловете в кошчето. Нула значи завинаги.",
+    "The number of old versions to keep, per file.": "Брой стари версии, които да бъдат пазени за всеки файл.",
    "The number of versions must be a number and cannot be blank.": "Броят версии трябва да бъде число и не може да бъде празно.",
    "The path cannot be blank.": "Пътят не може да бъде празен.",
    "The rate limit must be a non-negative number (0: no limit)": "Ограничението на скоростта трябва да бъде положително число (0: неограничено)",
-    "The rescan interval must be a non-negative number of seconds.": "Интервала на сканиране трябва да бъде не отрицателно число в секунди.",
-    "There are no devices to share this folder with.": "There are no devices to share this folder with.",
-    "They are retried automatically and will be synced when the error is resolved.": "Ще бъдат спрени и автоматично синхронизирани, когато грешката бъде оправена.",
-    "This Device": "Вашето устройство",
-    "This can easily give hackers access to read and change any files on your computer.": "Така се предоставя изключително лесен достъп (четене, редактиране и изтриване) до всеки файл, на компютъра Ви.",
-    "This is a major version upgrade.": "Това е нова основна версия.",
-    "This setting controls the free space required on the home (i.e., index database) disk.": "Тази настройка контролира нужното свободното място на основния (пр. този с базата данни) диск.",
+    "The rescan interval must be a non-negative number of seconds.": "Интервалът на обхождане трябва да е положителен брой секунди.",
+    "There are no devices to share this folder with.": "Няма устройства, с които да споделите папката.",
+    "There are no folders to share with this device.": "Няма папка, която да споделите с устройството.",
+    "They are retried automatically and will be synced when the error is resolved.": "Ще бъдат спрени и автоматично синхронизирани, когато грешката бъде отстранена.",
+    "This Device": "Това устройство",
+    "This can easily give hackers access to read and change any files on your computer.": "This can easily give hackers access to read and change any files on your computer.",
+    "This device cannot automatically discover other devices or announce its own address to be found by others.  Only devices with statically configured addresses can connect.": "This device cannot automatically discover other devices or announce its own address to be found by others.  Only devices with statically configured addresses can connect.",
+    "This is a major version upgrade.": "Това е обновяване на значимо издание.",
+    "This setting controls the free space required on the home (i.e., index database) disk.": "Тази настройка управлява нужното свободното място на основния (пр. този с банката от данни) диск.",
    "Time": "Време",
-    "Time the item was last modified": "Часът на последна промяна на елемента",
-    "Trash Can File Versioning": "Само на файловете в кошчето",
-    "Type": "Тип",
-    "UNIX Permissions": "UNIX Permissions",
-    "Unavailable": "Не е на разположение",
-    "Unavailable/Disabled by administrator or maintainer": "Не е на разположение/Деактивриан от администраторът или поддръжника",
+    "Time the item was last modified": "Час на последна промяна на елемента",
+    "Trash Can File Versioning": "Версии от вида „кошче за отпадъци“",
+    "Type": "Вид",
+    "UNIX Permissions": "Права на UNIX",
+    "Unavailable": "Няма налични",
+    "Unavailable/Disabled by administrator or maintainer": "Недостъпно или изключено от администратора или поддръжката",
    "Undecided (will prompt)": "Неизбрано (ще попита)",
+    "Unexpected Items": "Неочаквани елементи",
+    "Unexpected items have been found in this folder.": "В папката са намерени неочаквани елементи.",
    "Unignore": "Unignore",
    "Unknown": "Неясно",
    "Unshared": "Несподелена",
-    "Unshared Devices": "Unshared Devices",
-    "Unused": "Неизползвано",
+    "Unshared Devices": "Устройства, с които не е споделена",
+    "Unshared Folders": "Несподелени папки",
+    "Untrusted": "Недоверено",
    "Up to Date": "Синхронизирано",
    "Updated": "Обновено",
-    "Upgrade": "Обнови",
-    "Upgrade To {%version%}": "Обновен до {{version}}",
+    "Upgrade": "Обновяване",
+    "Upgrade To {%version%}": "Обновено до {{version}}",
    "Upgrading": "Обновяване",
    "Upload Rate": "Скорост на качване",
    "Uptime": "Работи от",
-    "Usage reporting is always enabled for candidate releases.": "Докладът за ползването е винаги включен за кандидат нови версии.",
-    "Use HTTPS for GUI": "Използвай HTTPS за потребителския интерфейс",
-    "Use notifications from the filesystem to detect changed items.": "Use notifications from the filesystem to detect changed items.",
-    "Variable Size Blocks": "Variable Size Blocks",
-    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Variable size blocks (also \"large blocks\") are more efficient for large files.",
+    "Usage reporting is always enabled for candidate releases.": "Отчитането на употребата винаги е включено за предварителни издания.",
+    "Use HTTPS for GUI": "Графичният интерфейс работи под HTTPS",
+    "Use notifications from the filesystem to detect changed items.": "Използва съобщения от файловата система, за да открива променени елементи.",
+    "Username/Password has not been set for the GUI authentication. Please consider setting it up.": "Няма зададени потребителско име и парола за достъп до графичния интерфейс. Помислете за създаването им.",
    "Version": "Версия",
    "Versions": "Версии",
    "Versions Path": "Път до версиите",
-    "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Версиите биват изтривани автоматично, когато са по-стари от максималната възраст или надминават броя версии разрешени в даден интервал.",
+    "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.",
+    "Waiting to Clean": "Waiting to Clean",
    "Waiting to Scan": "Waiting to Scan",
    "Waiting to Sync": "Waiting to Sync",
-    "Waiting to scan": "Waiting to scan",
-    "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Предупреждение, този път е по-горна директория на съществуващата папка \"{{otherFolder}}\".",
-    "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Предупреждение, този път е по-горна директория на съществуващата папка \"{{otherFolderLabel}}\" ({{otherFolder}}).",
-    "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Внимание, това е вътрешна папка на вече съществуваща папка \"{{otherFolder}}\".",
-    "Warning, this path is a subdirectory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Предупреждение, този път е под-директория на съществуващата папка \"{{otherFolderLabel}}\" ({{otherFolder}}).",
-    "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Предупреждение: Ако използвате външна програма за наблюдение като {{syncthingInotify}}, трябва да я деактивирате.",
-    "Watch for Changes": "Мониторинг за промени",
-    "Watching for Changes": "Мониторинг за промени",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
-    "When adding a new device, keep in mind that this device must be added on the other side too.": "Когато добавяте ново устройство имайте предвид, че това устройство също трябва да бъде добавено от другата страна.",
-    "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.": "Когато добавяте нов идентификатор на папка имайте предвид, че той се използва за свързване на папките между отделните устройства. Идентификатора разграничава главни/малки букви.",
+    "Warning": "Предупреждение",
+    "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Предупреждение, този път е родителска папка съществуващата „{{otherFolder}}“.",
+    "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Предупреждение, този път е родителска папка съществуващата „{{otherFolderLabel}}“ ({{otherFolder}}).",
+    "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Предупреждение, този път е подпапка съществуващата „{{otherFolder}}“.",
+    "Warning, this path is a subdirectory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Предупреждение, този път е подпапка на съществуващата „{{otherFolderLabel}}“ ({{otherFolder}}).",
+    "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Предупреждение: Ако използвате външно приложение за наблюдение като {{syncthingInotify}}, трябва да го спрете.",
+    "Watch for Changes": "Наблюдаване за промени",
+    "Watching for Changes": "Наблюдаване за промени",
+    "Watching for changes discovers most changes without periodic scanning.": "Наблюдението за промени открива повечето изменения без периодични обхождания.",
+    "When adding a new device, keep in mind that this device must be added on the other side too.": "Когато добавяте ново устройство имайте предвид, че то също трябва да бъде добавено от другата страна.",
+    "When adding a new folder, keep in mind that the Folder ID is used to tie folders together between devices. They are case sensitive and must match exactly between all devices.": "Като добавяте папката имайте предвид, че той се използва за еднозначно указване на папката между устройствата. Има разлика в регистъра на знаците и трябва изцяло да съвпада между всички устройства.",
    "Yes": "Да",
-    "You can also select one of these nearby devices:": "Също така може да изберете едно от устройствата, които намират се наблизо:",
+    "You can also select one of these nearby devices:": "Също така може да изберете едно от устройствата, които се намират наблизо:",
    "You can change your choice at any time in the Settings dialog.": "Може да промените решението си по всяко време в прозореца Настройки.",
-    "You can read more about the two release channels at the link below.": "Може да научите допълнително за двата канала на версии, следвайки връзката по-долу.",
-    "You have no ignored devices.": "Няма игнорирани устройства.",
-    "You have no ignored folders.": "Няма игнорирани папки.",
-    "You have unsaved changes. Do you really want to discard them?": "Има незапазени промени. Наистина ли желаете да ги отмените?",
-    "You must keep at least one version.": "Трябва да пазиш поне една версия.",
+    "You can read more about the two release channels at the link below.": "Може да научите повече за двата канала на издание, следвайки препратката по-долу.",
+    "You have no ignored devices.": "Няма пренебрегнати устройства.",
+    "You have no ignored folders.": "Няма пренебрегнати папки.",
+    "You have unsaved changes. Do you really want to discard them?": "Има незапазени промени. Желаете ли да се откажете от тях?",
+    "You must keep at least one version.": "Необходимо е да има поне една версия.",
+    "You should never add or change anything locally in a \"{%receiveEncrypted%}\" folder.": "Никога не трябва да променяте нищо в папка от вида „{{receiveEncrypted}}“.",
    "days": "дни",
-    "directories": "директории",
+    "directories": "папки",
    "files": "файла",
    "full documentation": "пълна документация",
    "items": "елемента",
-    "{%device%} wants to share folder \"{%folder%}\".": "{{device}} желае да сподели папката \"{{folder}}\".",
-    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} желае да сподели папката \"{{folderlabel}}\" ({{folder}})."
+    "seconds": "секунди",
+    "{%device%} wants to share folder \"{%folder%}\".": "{{device}} споделя папката „{{folder}}“.",
+    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} споделя папката „{{folder}}“. ({{folder}}).",
+    "{%reintroducer%} might reintroduce this device.": "Поръчителят {{reintroducer}} може отново да предложи това устройство."
 }
--- a/gui/default/assets/lang/lang-ca@valencia.json
+++ b/gui/default/assets/lang/lang-ca@valencia.json
@@ -17,20 +17,21 @@
    "Addresses": "Direccions",
    "Advanced": "Avançat",
    "Advanced Configuration": "Configuració avançada",
-    "Advanced settings": "Ajustos avançats.",
    "All Data": "Totes les dades",
+    "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.": "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.",
    "Allow Anonymous Usage Reporting?": "Permetre informes d'ús anònim?",
    "Allowed Networks": "Xarxes permeses",
    "Alphabetic": "Alfabètic",
-    "An external command handles the versioning. It has to remove the file from the shared folder.": "Un command extern maneja les versions. Té que eliminar el fitxer de la carpeta compartida.",
    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Un comandament extern maneja el versionat. És necessari eliminar el fitxer de la carpeta compartida. Si la ruta a l'aplicació conté espais, hi ha que ficar-los entre cometes.",
-    "An external command handles the versioning. It has to remove the file from the synced folder.": "Un comando extern controla el versionat. És necessari eliminar el fitxer de la carpeta sincronitzada.",
    "Anonymous Usage Reporting": "Informe d'ús anònim",
    "Anonymous usage report format has changed. Would you like to move to the new format?": "El format del informe anònim d'ús ha canviat. Vols canviar al nou format?",
-    "Any devices configured on an introducer device will be added to this device as well.": "Tots els dispositius configurats en un dispositiu presentador seràn afegits també a aquest dispositiu.",
+    "Are you sure you want to continue?": "Are you sure you want to continue?",
+    "Are you sure you want to override all remote changes?": "Are you sure you want to override all remote changes?",
+    "Are you sure you want to permanently delete all these files?": "Are you sure you want to permanently delete all these files?",
    "Are you sure you want to remove device {%name%}?": "Estàs segur de que vols eliminar el dispositiu {{name}}?",
    "Are you sure you want to remove folder {%label%}?": "Estàs segur de que vols eliminar la carpeta {{label}}?",
    "Are you sure you want to restore {%count%} files?": "Estàs segur de que vols restaurar {{count}} fitxers?",
+    "Are you sure you want to revert all local changes?": "Are you sure you want to revert all local changes?",
    "Are you sure you want to upgrade?": "Are you sure you want to upgrade?",
    "Auto Accept": "Auto Acceptar",
    "Automatic Crash Reporting": "Automatic Crash Reporting",
@@ -41,37 +42,47 @@
    "Available debug logging facilities:": "Hi han disponibles les següents utilitats per a depurar el registre:",
    "Be careful!": "Tin precaució!",
    "Bugs": "Errors (Bugs)",
-    "CPU Utilization": "Utilització de la CPU",
+    "Cancel": "Cancel",
    "Changelog": "Registre de canvis",
    "Clean out after": "Netejar després de",
+    "Cleaning Versions": "Cleaning Versions",
+    "Cleanup Interval": "Cleanup Interval",
    "Click to see discovery failures": "Clica per a vore els fallos en el descobriment",
+    "Click to see full identification string and QR code.": "Click to see full identification string and QR code.",
    "Close": "Tancar",
    "Command": "Comando",
    "Comment, when used at the start of a line": "Comentar, quant s'utilitza al principi d'una línia",
    "Compression": "Compresió",
    "Configured": "Configurat",
+    "Connected (Unused)": "Connected (Unused)",
    "Connection Error": "Error de connexió",
    "Connection Type": "Tipus de connexió",
    "Connections": "Connexions",
    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Ara està disponible la revisió continua de canvix dins de Syncthing. Acò detectarà els canvis i llençarà un escaneig sols a les rutes modificades. Els beneficis són que els canvis es propaguen mé ràpidamente i es necessiten menys escanejos complets.",
    "Copied from elsewhere": "Copiat de qualsevol lloc",
    "Copied from original": "Copiat de l'original",
-    "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 els següents Col·laboradors:",
-    "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 els següents Col·laboradors:",
    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 els següents Col·laboradors:",
    "Creating ignore patterns, overwriting an existing file at {%path%}.": "Creant patrons a ignorar, sobreescriguent un fitxer que ja existeix a {{path}}.",
    "Currently Shared With Devices": "Currently Shared With Devices",
    "Danger!": "Perill!",
    "Debugging Facilities": "Utilitats de Depuració",
+    "Default Configuration": "Default Configuration",
+    "Default Device": "Default Device",
+    "Default Folder": "Default Folder",
    "Default Folder Path": "Carpeta de la Ruta per Defecte",
+    "Defaults": "Defaults",
+    "Delete": "Esborrar",
+    "Delete Unexpected Items": "Delete Unexpected Items",
    "Deleted": "Esborrat",
    "Deselect All": "Anul·lar tota la selecció",
    "Deselect devices to stop sharing this folder with.": "Deselect devices to stop sharing this folder with.",
+    "Deselect folders to stop sharing with this device.": "Deselect folders to stop sharing with this device.",
    "Device": "Dispositiu",
    "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Dispositiu \"{{name}}\" ({{device}} a l'adreça {{address}}) vol connectar. Afegir nou dispositiu?",
    "Device ID": "ID del dispositiu",
    "Device Identification": "Identificació del dispositiu",
    "Device Name": "Nom del dispositiu",
+    "Device is untrusted, enter encryption password": "Device is untrusted, enter encryption password",
    "Device rate limits": "Límits de la tasa del dispositiu",
    "Device that last modified the item": "El dispositiu que va modificar el item per última vegada",
    "Devices": "Dispositius",
@@ -80,11 +91,16 @@
    "Disabled periodic scanning and disabled watching for changes": "Desactivat l'escaneig periòdic i el rastreig continu de canvis",
    "Disabled periodic scanning and enabled watching for changes": "Desactivat l'escaneig periòdic i activat el rastreig continu de canvis",
    "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Desactivat l'escaneig periòdic i errada al rastreig continu de canvis, es reintentarà cada 1 minut:",
+    "Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).": "Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).",
    "Discard": "Descartar",
    "Disconnected": "Desconnectat",
+    "Disconnected (Unused)": "Disconnected (Unused)",
    "Discovered": "Descobert",
    "Discovery": "Descobriment",
    "Discovery Failures": "Fallades al Descobriment",
+    "Discovery Status": "Discovery Status",
+    "Dismiss": "Dismiss",
+    "Do not add it to the ignore list, so this notification may recur.": "Do not add it to the ignore list, so this notification may recur.",
    "Do not restore": "No restaurar",
    "Do not restore all": "No restaurar en absolut",
    "Do you want to enable watching for changes for all your folders?": "Vols activar el rastreig continu de canvis per a totes les carpetes?",
@@ -94,8 +110,9 @@
    "Downloading": "Descarregant",
    "Edit": "Editar",
    "Edit Device": "Editar Dispositiu",
+    "Edit Device Defaults": "Edit Device Defaults",
    "Edit Folder": "Editar Carpeta",
-    "Editing": "Editant",
+    "Edit Folder Defaults": "Edit Folder Defaults",
    "Editing {%path%}.": "Editant {{path}}.",
    "Enable Crash Reporting": "Enable Crash Reporting",
    "Enable NAT traversal": "Permetre NAT transversal",
@@ -103,26 +120,21 @@
    "Enabled": "Activat",
    "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Introdueix un nombre no negatiu (per exemple, \"2.35\") i selecciona una unitat. Els percentatges són com a part del tamany total del disc.",
    "Enter a non-privileged port number (1024 - 65535).": "Introdueix un nombre de port sense privilegis (1024-65535).",
-    "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Introdueix adreces separades per coma (\"tcp://ip:port\", \"tcp://host:port\") o \"dynamic\" per a realitzar el descobriment automàtic de l'adreça.",
    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Introduïr adreces separades per coma (\"tcp://ip:port\", \"tcp://host:port\") o dinàmiques per al descobriment automàtic de l'adreça.",
    "Enter ignore patterns, one per line.": "Introduïr patrons a ignorar, un per línia.",
    "Enter up to three octal digits.": "Enter up to three octal digits.",
    "Error": "Error",
    "External File Versioning": "Versionat extern de fitxers",
    "Failed Items": "Objectes fallits",
-    "Failed to load ignore patterns": "Errada al carregar els patrons a ignorar",
+    "Failed to load ignore patterns.": "Failed to load ignore patterns.",
    "Failed to setup, retrying": "Errada en la configuració, reintentant",
    "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "És possible que es produïsca una fallada al connectar als servidors IPv6 si no hi ha connectivitat IPv6.",
    "File Pull Order": "Ordre de fitxers del pull",
    "File Versioning": "Versionat de fitxer",
-    "File permission bits are ignored when looking for changes. Use on FAT file systems.": "Els bits de permís del fitxer són ignorats quant es busquen els canvis. Utilitzar en sistemes de fitxers FAT.",
    "Files are moved to .stversions directory when replaced or deleted by Syncthing.": "Els fitxers seràn moguts al directori .stversions quant siguen reemplaçats o esborrats per Syncthing.",
-    "Files are moved to .stversions folder when replaced or deleted by Syncthing.": "Els arxius es menejen a la carpeta .stversions quant són substituïts o esborrats per Syncthing.",
    "Files are moved to date stamped versions in a .stversions directory when replaced or deleted by Syncthing.": "Els arxius seran moguts a un directori .stversions a versions amb control de la data quan siguen reemplaçats o esborrats per Syncthing.",
-    "Files are moved to date stamped versions in a .stversions folder when replaced or deleted by Syncthing.": "Els fitxers són canviats a versions amb indicació de data en una carpeta \".stversions\" quant són reemplaçats o esborrats per Syncthing.",
    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "Els fitxers són protegits dels canvis fets en altres dispositius, però els canvis fets en aquest dispositiu seràn enviats a la resta del grup (cluster).",
    "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.": "Els fitxers es sincronitzen des-d'el cluster, però tots els canvis fets localment no s'enviaràn als altres dispositius.",
-    "Filesystem Notifications": "Notificacions del Sistema de Fitxers",
    "Filesystem Watcher Errors": "Errors del Vigilant del Sistema de Fitxers",
    "Filter by date": "Filtrar per data",
    "Filter by name": "Filtrar per nom",
@@ -131,24 +143,28 @@
    "Folder Label": "Etiqueta de la Carpeta",
    "Folder Path": "Ruta de la carpeta",
    "Folder Type": "Tipus de carpeta",
+    "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Folder type \"{{receiveEncrypted}}\" can only be set when adding a new folder.",
+    "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Folder type \"{{receiveEncrypted}}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.",
    "Folders": "Carpetes",
    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Per a les següents carpetes va ocòrrer un error mentre es començava a vigilar els canvis. Es tornarà a intentar cada minut, així que potser els errors desapareguen pronte. Si persisteixen, tracta d'arreglar el motiu subjacent i demana ajuda si no pots.",
    "Full Rescan Interval (s)": "Interval de l'Escaneig Complet (segons)",
    "GUI": "IGU (Interfície Gràfica d'Usuari)",
    "GUI Authentication Password": "Password d'autenticació de l'Interfície Gràfica d'Usuari (GUI)",
    "GUI Authentication User": "Autenticació de l'usuari de l'Interfície Gràfica d'Usuari (GUI)",
+    "GUI Authentication: Set User and Password": "GUI Authentication: Set User and Password",
    "GUI Listen Address": "Adreça d'Escolta de l'Interfície Gràfica d'Usuari (GUI).",
-    "GUI Listen Addresses": "Direcció d'escolta de l'Interfície Gràfica d'Usuari (GUI)",
    "GUI Theme": "Tema de l'Interfície Gràfica d'Usuari (GUI)",
    "General": "General",
    "Generate": "Generar",
-    "Global Changes": "Canvis Globals",
    "Global Discovery": "Descobriment global",
    "Global Discovery Servers": "Servidors de Descobriment Global",
    "Global State": "Estat global",
    "Help": "Ajuda",
    "Home page": "Pàgina inicial",
    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.",
+    "Identification": "Identification",
+    "If untrusted, enter encryption password": "If untrusted, enter encryption password",
+    "If you want to prevent other users on this computer from accessing Syncthing and through it your files, consider setting up authentication.": "If you want to prevent other users on this computer from accessing Syncthing and through it your files, consider setting up authentication.",
    "Ignore": "Ignorar",
    "Ignore Patterns": "Patrons a ignorar",
    "Ignore Permissions": "Permisos a ignorar",
@@ -161,14 +177,15 @@
    "Introducer": "Presentador",
    "Inversion of the given condition (i.e. do not exclude)": "Inversió de la condició donada (per exemple no excloure)",
    "Keep Versions": "Mantindre versions",
+    "LDAP": "LDAP",
    "Largest First": "El més gran primer",
-    "Last File Received": "Darrer fitxer rebut",
    "Last Scan": "Últim escaneig",
    "Last seen": "Vist per última vegada",
-    "Later": "Més tard",
    "Latest Change": "Últim Canvi",
    "Learn more": "Saber més",
    "Limit": "Límit",
+    "Listener Failures": "Listener Failures",
+    "Listener Status": "Listener Status",
    "Listeners": "Escoltants",
    "Loading data...": "Carregant dades...",
    "Loading...": "Carregant...",
@@ -178,13 +195,10 @@
    "Local State (Total)": "Estat Local (Total)",
    "Locally Changed Items": "Dispositius Canviats Localment",
    "Log": "Registre",
-    "Log tailing paused. Click here to continue.": "Pausada l'adició de dades al registre. Polsa ací per continuar.",
-    "Log tailing paused. Scroll to bottom continue.": "Pausat el seguiment del registre. Es continua fins al final.",
    "Log tailing paused. Scroll to the bottom to continue.": "Pausada l'anotació al registre. Baixeu fins al final per continuar.",
    "Logs": "Registres",
    "Major Upgrade": "Actualització important",
    "Mass actions": "Accions en masa",
-    "Master": "Mestre",
    "Maximum Age": "Edat màxima",
    "Metadata Only": "Sols metadades",
    "Minimum Free Disk Space": "Espai minim de disc lliure",
@@ -200,7 +214,7 @@
    "No File Versioning": "Sense versionat de fitxer",
    "No files will be deleted as a result of this operation.": "Amb aquesta operació no s'esborrarà cap fitxer.",
    "No upgrades": "Sense actualitzacions",
-    "Normal": "Normal",
+    "Not shared": "Not shared",
    "Notice": "Avís",
    "OK": "OK",
    "Off": "Off",
@@ -210,19 +224,21 @@
    "Out of Sync": "Sense sincronització",
    "Out of Sync Items": "Dispositius sense sincronitzar",
    "Outgoing Rate Limit (KiB/s)": "Límit de pujada (KiB/s)",
+    "Override": "Override",
    "Override Changes": "Sobreescriure els canvis",
    "Path": "Ruta",
    "Path to the folder on the local computer. Will be created if it does not exist. The tilde character (~) can be used as a shortcut for": "Ruta a la carpeta local en l'ordinador. Es crearà si no existeix. El caràcter tilde (~) es pot utilitzar com a drecera",
    "Path where new auto accepted folders will be created, as well as the default suggested path when adding new folders via the UI. Tilde character (~) expands to {%tilde%}.": "La ruta on es crearan les noves carpetes acceptades automàticament, així com la ruta sugerida quan s'afigen noves carpetes des-de l'IU. El caracter tilde (~) s'expandeix a {{tilde}}.",
    "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "La ruta on deuen guardar-se les versions (deixar buit per al directori per defecte .stversions en la carpeta compartida).",
-    "Path where versions should be stored (leave empty for the default .stversions folder in the folder).": "Ruta on les versions deurien estar emmagatzemades (deixar buit per a la carpeta .stversions en la carpeta).",
    "Pause": "Pausa",
    "Pause All": "Pausa Tot",
    "Paused": "Pausat",
+    "Paused (Unused)": "Paused (Unused)",
    "Pending changes": "Canvis pendents",
    "Periodic scanning at given interval and disabled watching for changes": "Escaneig periòdic a l'interval determinat i desactivat el rastreig continu de canvis",
    "Periodic scanning at given interval and enabled watching for changes": "Escaneig periòdic a l'interval determinat i activat el rastreig continu de canvis",
    "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Escaneig periòdic a l'interval determinat i errada al activar el rastreig continu de canvis, reintentant cada 1 minut:",
+    "Permanently add it to the ignore list, suppressing further notifications.": "Permanently add it to the ignore list, suppressing further notifications.",
    "Permissions": "Permisos",
    "Please consult the release notes before performing a major upgrade.": "Per favor, consultar les notes de la versió abans de fer una actualització important.",
    "Please set a GUI Authentication User and Password in the Settings dialog.": "Per favor, estableix un usuari i password per a l'Interfície Gràfica d'Usuari en el menú d'Adjustos.",
@@ -233,21 +249,22 @@
    "Preview": "Vista prèvia",
    "Preview Usage Report": "Informe d'ús de vista prèvia",
    "Quick guide to supported patterns": "Guía ràpida de patrons suportats",
-    "RAM Utilization": "Utilització de la RAM",
    "Random": "Aleatori",
+    "Receive Encrypted": "Receive Encrypted",
    "Receive Only": "Només rebre",
+    "Received data is already encrypted": "Received data is already encrypted",
    "Recent Changes": "Canvis Recents",
    "Reduced by ignore patterns": "Reduït ignorant patrons",
    "Release Notes": "Notes de la versió",
    "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "Les versions candidates (Release Candidates) contenen les darreres característiques i arreglos. Són paregudes a les versions tradicionals bi-semanals de Syncthing. ",
    "Remote Devices": "Dispositius Remots",
+    "Remote GUI": "Remote GUI",
    "Remove": "Eliminar",
    "Remove Device": "Eliminar Dispositiu",
    "Remove Folder": "Eliminar Carpeta",
    "Required identifier for the folder. Must be the same on all cluster devices.": "Identificador necessari per la carpeta. Deu ser el mateix en tots els dispositius del cluster.",
    "Rescan": "Tornar a buscar",
    "Rescan All": "Tornar a buscar tot",
-    "Rescan Interval": "Interval de nova busca",
    "Rescans": "Reescanejos",
    "Restart": "Reiniciar",
    "Restart Needed": "Reinici necesari",
@@ -257,19 +274,18 @@
    "Resume": "Continuar",
    "Resume All": "Continuar Tot",
    "Reused": "Reutilitzat",
+    "Revert": "Revert",
    "Revert Local Changes": "Revertir els canvis locals",
-    "Running": "Executant",
    "Save": "Gravar",
    "Scan Time Remaining": "Temps d'escaneig restant",
    "Scanning": "Rastrejant",
-    "See external versioner help for supported templated command line parameters.": "Consulta l'ajuda externa sobre versions per a conéixer els paràmetres de la plantilla de la línia de comandaments.",
    "See external versioning help for supported templated command line parameters.": "Consulta l'ajuda externa sobre versions per a conéixer els paràmetres de la plantilla de la línia de comandaments.",
    "Select All": "Sel·leccionar Tot",
    "Select a version": "Seleccionar una versió",
    "Select additional devices to share this folder with.": "Select additional devices to share this folder with.",
+    "Select additional folders to share with this device.": "Select additional folders to share with this device.",
    "Select latest version": "Seleccionar l'última versió",
    "Select oldest version": "Seleccionar la versió més antiga",
-    "Select the devices to share this folder with.": "Selecciona els dispositius amb els que compartir aquesta carpeta.",
    "Select the folders to share with this device.": "Selecciona les carpetes per a compartir amb aquest dispositiu.",
    "Send & Receive": "Enviar i Rebre",
    "Send Only": "Enviar Solament",
@@ -277,12 +293,14 @@
    "Share": "Compartir",
    "Share Folder": "Compartir carpeta",
    "Share Folders With Device": "Compartir carpetes amb el dispositiu",
-    "Share With Devices": "Compartir amb els dispositius",
    "Share this folder?": "Compartir aquesta carpeta?",
+    "Shared Folders": "Shared Folders",
    "Shared With": "Compartit amb",
    "Sharing": "Compartint",
    "Show ID": "Mostrar ID",
    "Show QR": "Mostrar QR",
+    "Show detailed discovery status": "Show detailed discovery status",
+    "Show detailed listener status": "Show detailed listener status",
    "Show diff with previous version": "Mostrar les diferències amb la versió prèvia",
    "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Mostrat en lloc de l'ID del dispositiu en l'estat del grup (cluster). S'anunciarà als altres dispositius com el nom opcional per defecte.",
    "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Mostrat en lloc de l'ID del dispositiu en l'estat del grup (cluster). S'actualitzarà al nom que el dispositiu anuncia si es deixa buit.",
@@ -292,7 +310,9 @@
    "Single level wildcard (matches within a directory only)": "Comodí de nivell únic (coincideix sols dins d'un directori)",
    "Size": "Tamany",
    "Smallest First": "El més xicotet primer",
+    "Some discovery methods could not be established for finding other devices or announcing this device:": "Some discovery methods could not be established for finding other devices or announcing this device:",
    "Some items could not be restored:": "Alguns ítems no s'han pogut restaurar:",
+    "Some listening addresses could not be enabled to accept connections:": "Some listening addresses could not be enabled to accept connections:",
    "Source Code": "Codi font",
    "Stable releases and release candidates": "Versions estables i versions candidates",
    "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "Les versions estables es retrasen sobre dos setmanes. Durant aquest temps es fiquen a prova com versions candidates.",
@@ -301,6 +321,7 @@
    "Start Browser": "Iniciar navegador",
    "Statistics": "Estadístiques",
    "Stopped": "Parat",
+    "Stores and syncs only encrypted data. Folders on all connected devices need to be set up with the same password or be of type \"{%receiveEncrypted%}\" too.": "Stores and syncs only encrypted data. Folders on all connected devices need to be set up with the same password or be of type \"{{receiveEncrypted}}\" too.",
    "Support": "Suport",
    "Support Bundle": "Lot de Suport",
    "Sync Protocol Listen Addresses": "Direccions d'escolta del protocol de sincronització",
@@ -308,6 +329,8 @@
    "Syncthing has been shut down.": "Syncthing s'ha apagat",
    "Syncthing includes the following software or portions thereof:": "Syncthing inclou el següent software o parts d'ell:",
    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing és Software Gratuït i Open Source llicenciat com MPL v2.0.",
+    "Syncthing is listening on the following network addresses for connection attempts from other devices:": "Syncthing is listening on the following network addresses for connection attempts from other devices:",
+    "Syncthing is not listening for connection attempts from other devices on any address.  Only outgoing connections from this device may work.": "Syncthing is not listening for connection attempts from other devices on any address.  Only outgoing connections from this device may work.",
    "Syncthing is restarting.": "Syncthing està reiniciant.",
    "Syncthing is upgrading.": "Syncthing està actualitzant-se.",
    "Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.": "Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.",
@@ -315,23 +338,29 @@
    "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing pareix que té un problema processant la seua sol·licitud. Per favor, refresque la pàgina o reinicie Syncthing si el problema persistix.",
    "Take me back": "Porta'm enrere",
    "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.": "L'adreça del GUI és sobreescrita per les opcions d'inici. Els canvis ací no surtiràn efecte mentre la sobreescritura estiga en marxa.",
+    "The Syncthing Authors": "The Syncthing Authors",
    "The Syncthing admin interface is configured to allow remote access without a password.": "L'interfície d'administració de Syncthing està configurat per a permetre l'accés remot sense una contrasenya.",
    "The aggregated statistics are publicly available at the URL below.": "Les estadístiques agregades estàn disponibles en la URL que figura a continuació.",
+    "The cleanup interval cannot be blank.": "The cleanup interval cannot be blank.",
    "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "La configuració ha sigut gravada però no activada. Syncthing deu reiniciar per tal d'activar la nova configuració.",
    "The device ID cannot be blank.": "L'ID del dispositiu no pot estar buida.",
    "The device ID to enter here can be found in the \"Actions > Show ID\" dialog on the other device. Spaces and dashes are optional (ignored).": "L'ID del dispositiu que hi ha que introduïr ací es pot trobar en el menú \"Accions > Mostrar ID\" en l'altre dispositiu. Els espais i les barres son opcionals (ignorats).",
    "The encrypted usage report is sent daily. It is used to track common platforms, folder sizes and app versions. If the reported data set is changed you will be prompted with this dialog again.": "L'informe encriptat d'ús s'envia diariament. S'utilitza per a rastrejar plataformes comuns, tamanys de carpetes i versions de l'aplicació. Si el conjunt de dades enviat a l'informe es canvia, se li demanarà a vosté l'autorització altra vegada.\n",
    "The entered device ID does not look valid. It should be a 52 or 56 character string consisting of letters and numbers, with spaces and dashes being optional.": "L'ID del dispositiu introduïda no pareix vàlida. Deuria ser una cadena de 52 o 56 caracters consistents en lletres i nombre, amb espais i barres opcionals.",
-    "The first command line parameter is the folder path and the second parameter is the relative path in the folder.": "El primer paràmetre de la línia de comandos és la ruta de la carpeta i el segon és la ruta relativa en la carpeta.",
    "The folder ID cannot be blank.": "L'ID de la carpeta no pot estar buit.",
    "The folder ID must be unique.": "L'ID de la carpeta deu ser única.",
+    "The folder content on other devices will be overwritten to become identical with this device. Files not present here will be deleted on other devices.": "The folder content on other devices will be overwritten to become identical with this device. Files not present here will be deleted on other devices.",
+    "The folder content on this device will be overwritten to become identical with other devices. Files newly added here will be deleted.": "The folder content on this device will be overwritten to become identical with other devices. Files newly added here will be deleted.",
    "The folder path cannot be blank.": "La ruta de la carpeta no pot estar buida.",
    "The following intervals are used: for the first hour a version is kept every 30 seconds, for the first day a version is kept every hour, for the first 30 days a version is kept every day, until the maximum age a version is kept every week.": "S'utilitzen els següents intervals: per a la primera hora es guarda una versió cada 30 segons, per al primer dia es guarda una versió cada hora, per als primers 30 dies es guarda una versió diaria, fins l'edat màxima es guarda una versió cada setmana.",
    "The following items could not be synchronized.": "Els següents objectes no s'han pogut sincronitzar.",
    "The following items were changed locally.": "Els següents ítems es canviaren localment.",
+    "The following methods are used to discover other devices on the network and announce this device to be found by others:": "The following methods are used to discover other devices on the network and announce this device to be found by others:",
+    "The following unexpected items were found.": "The following unexpected items were found.",
+    "The interval must be a positive number of seconds.": "The interval must be a positive number of seconds.",
+    "The interval, in seconds, for running cleanup in the versions directory. Zero to disable periodic cleaning.": "The interval, in seconds, for running cleanup in the versions directory. Zero to disable periodic cleaning.",
    "The maximum age must be a number and cannot be blank.": "L'edat màxima deu ser un nombre i no pot estar buida.",
    "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "El temps màxim per a guardar una versió (en dies, ficar 0 per a guardar les versions per a sempre).",
-    "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "El porcentatge d'espai mínim lliure en el disc deu ser un nombre no negatiu entre 0 i 100 (ambdós inclosos).",
    "The number of days must be a number and cannot be blank.": "El nombre de dies deu ser un nombre i no pot estar en blanc.",
    "The number of days to keep files in the trash can. Zero means forever.": "El nombre de dies per a mantindre els arxius a la paperera. Cero vol dir \"per a sempre\".",
    "The number of old versions to keep, per file.": "El nombre de versions antigues per a guardar, per cada fitxer.",
@@ -340,9 +369,11 @@
    "The rate limit must be a non-negative number (0: no limit)": "El llímit del ritme deu ser un nombre no negatiu (0: sense llímit)",
    "The rescan interval must be a non-negative number of seconds.": "L'interval de reescaneig deu ser un nombre positiu de segons.",
    "There are no devices to share this folder with.": "There are no devices to share this folder with.",
+    "There are no folders to share with this device.": "There are no folders to share with this device.",
    "They are retried automatically and will be synced when the error is resolved.": "Es reintenta automàticament i es sincronitzaràn quant el resolga l'error.",
    "This Device": "Aquest Dispositiu",
    "This can easily give hackers access to read and change any files on your computer.": "Açò pot donar accés fàcilment als hackers per a llegir i canviar qualsevol fitxer al teu ordinador.",
+    "This device cannot automatically discover other devices or announce its own address to be found by others.  Only devices with statically configured addresses can connect.": "This device cannot automatically discover other devices or announce its own address to be found by others.  Only devices with statically configured addresses can connect.",
    "This is a major version upgrade.": "Aquesta és una actualització important de la versió.",
    "This setting controls the free space required on the home (i.e., index database) disk.": "Aquest ajust controla l'espai lliure requerit en el disc inicial (per exemple, la base de dades de l'index).",
    "Time": "Temps",
@@ -353,11 +384,14 @@
    "Unavailable": "No disponible",
    "Unavailable/Disabled by administrator or maintainer": "No disponible/Desactivar per l'administrador o mantenedor",
    "Undecided (will prompt)": "No decidit (es preguntarà)",
+    "Unexpected Items": "Unexpected Items",
+    "Unexpected items have been found in this folder.": "Unexpected items have been found in this folder.",
    "Unignore": "Designorar",
    "Unknown": "Desconegut",
    "Unshared": "No compartit",
    "Unshared Devices": "Unshared Devices",
-    "Unused": "No utilitzat",
+    "Unshared Folders": "Unshared Folders",
+    "Untrusted": "Untrusted",
    "Up to Date": "Actualitzat",
    "Updated": "Actualitzat",
    "Upgrade": "Actualitzar",
@@ -368,15 +402,15 @@
    "Usage reporting is always enabled for candidate releases.": "Els informes d'ús sempre estan activats per a les versions candidates.",
    "Use HTTPS for GUI": "Utilitzar HTTPS per a l'Interfície Gràfica d'Usuari (GUI)",
    "Use notifications from the filesystem to detect changed items.": "Usar notificacions del sistema de fitxers per a detectar els ítems canviats.",
-    "Variable Size Blocks": "Blocs de Tamany Variable",
-    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Els blocs de tamany variable (també coneguts com \"blocs grans\") són més eficients per als fitxers grans.",
+    "Username/Password has not been set for the GUI authentication. Please consider setting it up.": "Username/Password has not been set for the GUI authentication. Please consider setting it up.",
    "Version": "Versió",
    "Versions": "Versions",
    "Versions Path": "Ruta de les versions",
    "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Les versions s'esborren automàticament si són més antigues que l'edat màxima o excedixen el nombre de fitxer permesos en un interval.",
+    "Waiting to Clean": "Waiting to Clean",
    "Waiting to Scan": "Waiting to Scan",
    "Waiting to Sync": "Waiting to Sync",
-    "Waiting to scan": "Esperant per a escanetjar",
+    "Warning": "Warning",
    "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Perill! Esta ruta és un directori pare d'una carpeta ja existent \"{{otherFolder}}\".",
    "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Perill! Esta ruta és un directori pare d'una carpeta existent \"{{otherFolderLabel}}\" ({{otherFolder}}).",
    "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Perill! Esta ruta és un subdirectori d'una carpeta que ja existeix nomenada \"{{otherFolder}}\".",
@@ -395,11 +429,14 @@
    "You have no ignored folders.": "No tens carpetes ignorades.",
    "You have unsaved changes. Do you really want to discard them?": "Tens canvis sense guardar. Realment vols descartar-los?",
    "You must keep at least one version.": "Es deu mantindre al menys una versió.",
+    "You should never add or change anything locally in a \"{%receiveEncrypted%}\" folder.": "You should never add or change anything locally in a \"{{receiveEncrypted}}\" folder.",
    "days": "dies",
    "directories": "directoris",
    "files": "arxius",
    "full documentation": "Documentació completa",
    "items": "Elements",
+    "seconds": "seconds",
    "{%device%} wants to share folder \"{%folder%}\".": "{{device}} vol compartit la carpeta \"{{folder}}\".",
-    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} vol compartir la carpeta \"{{folderlabel}}\" ({{folder}})."
+    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} vol compartir la carpeta \"{{folderlabel}}\" ({{folder}}).",
+    "{%reintroducer%} might reintroduce this device.": "{{reintroducer}} might reintroduce this device."
 }
--- a/gui/default/assets/lang/lang-cs.json
+++ b/gui/default/assets/lang/lang-cs.json
@@ -17,20 +17,21 @@
    "Addresses": "Adresy",
    "Advanced": "Pokročilé",
    "Advanced Configuration": "Pokročilá nastavení",
-    "Advanced settings": "Pokročilá nastavení",
    "All Data": "Všechna data",
+    "All folders shared with this device must be protected by a password, such that all sent data is unreadable without the given password.": "Všechny složky sdílené s tímto zařízením musí být chráněna heslem, aby byla odesílaná data bez hesla nečitelná.",
    "Allow Anonymous Usage Reporting?": "Povolit anonymní hlášení o používání?",
    "Allowed Networks": "Sítě, ze kterých je umožněn přístup",
    "Alphabetic": "Abecední",
-    "An external command handles the versioning. It has to remove the file from the shared folder.": "Správu verzí obstarává externí příkaz. U toho je třeba, aby neaktuální soubory jím byly odsouvány pryč ze sdílené složky.",
    "An external command handles the versioning. It has to remove the file from the shared folder. If the path to the application contains spaces, it should be quoted.": "Správu verzí obstarává externí příkaz. U toho je třeba, aby neaktuální soubory jím byly odsouvány pryč ze sdílené složky. Pokud popis umístění tohoto příkazu obsahuje mezeru, je třeba popis umístění uzavřít do uvozovek.",
-    "An external command handles the versioning. It has to remove the file from the synced folder.": "Správu verzí obstarává externí příkaz. U toho je třeba, aby neaktuální soubory jím byly odsouvány pryč ze synchronizované složky.",
    "Anonymous Usage Reporting": "Anonymní hlášení o používání",
    "Anonymous usage report format has changed. Would you like to move to the new format?": "Formát anonymního hlášení o používání byl změněn. Chcete přejít na nový formát?",
-    "Any devices configured on an introducer device will be added to this device as well.": "Jakákoliv zařízení, nastavená na zavaděči, budou přidána také na toto zařízení.",
+    "Are you sure you want to continue?": "Skutečně si přejete pokračovat?",
+    "Are you sure you want to override all remote changes?": "Skutečně si přejete přebít všechny vzdálené změny?",
+    "Are you sure you want to permanently delete all these files?": "Skutečně chcete smazat všechny tyto soubory?",
    "Are you sure you want to remove device {%name%}?": "Opravdu chcete odebrat zařízení {{name}}?",
    "Are you sure you want to remove folder {%label%}?": "Opravdu chcete odebrat složku {{label}}?",
    "Are you sure you want to restore {%count%} files?": "Opravdu chcete obnovit {{count}} souborů?",
+    "Are you sure you want to revert all local changes?": "Skutečně si přejete vrátit všechny lokální změny?",
    "Are you sure you want to upgrade?": "Skutečně chcete provést aktualizaci?",
    "Auto Accept": "Přijmout automaticky",
    "Automatic Crash Reporting": "Automatické hlášení pádů",
@@ -41,37 +42,47 @@
    "Available debug logging facilities:": "Dostupná logovací zařízení pro ladění:",
    "Be careful!": "Buďte opatrní!",
    "Bugs": "Chyby",
-    "CPU Utilization": "Využití procesoru",
+    "Cancel": "Zrušit",
    "Changelog": "Seznam změn",
    "Clean out after": "Vyčistit po",
+    "Cleaning Versions": "Mazání verzí",
+    "Cleanup Interval": "Interval mazání",
    "Click to see discovery failures": "Kliknutím zobrazíte nezdary při objevování",
+    "Click to see full identification string and QR code.": "Kliknutím zobrazíte úplnou identifikaci a QR kód.",
    "Close": "Zavřít",
    "Command": "Příkaz",
    "Comment, when used at the start of a line": "Pokud použito na jeho začátku, je řádek považován za komentář",
    "Compression": "Komprese",
    "Configured": "Nastaveno",
+    "Connected (Unused)": "Připojeno (nepoužité)",
    "Connection Error": "Chyba připojení",
    "Connection Type": "Typ připojení",
    "Connections": "Spojení",
    "Continuously watching for changes is now available within Syncthing. This will detect changes on disk and issue a scan on only the modified paths. The benefits are that changes are propagated quicker and that less full scans are required.": "Syncthing nyní umožňuje nepřetržité sledování změn. To zachytí změny na úložišti a spustí sken pouze pro umístění, ve kterých se něco změnilo. Výhodami jsou rychlejší propagace změn a méně plných skenů.",
    "Copied from elsewhere": "Zkopírováno odjinud",
    "Copied from original": "Zkopírováno z originálu",
-    "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 následující přispěvatelé:",
-    "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 následující přispěvatelé:",
    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 následující přispěvatelé:",
    "Creating ignore patterns, overwriting an existing file at {%path%}.": "Vytvářejí se vzory ignorovaného a přepisuje se jimi existující soubor v {{path}}.",
    "Currently Shared With Devices": "Aktuálně sdíleno se zařízeními",
    "Danger!": "Nebezpečí!",
    "Debugging Facilities": "Nástroje pro ladění",
+    "Default Configuration": "Výchozí nastavení",
+    "Default Device": "Výchozí zařízení",
+    "Default Folder": "Výchozí složka",
    "Default Folder Path": "Popis umístění výchozí složky",
+    "Defaults": "Výchozí hodnoty",
+    "Delete": "Smazat",
+    "Delete Unexpected Items": "Smazat neočekávané položky",
    "Deleted": "Smazáno",
    "Deselect All": "Zrušit výběr všeho",
    "Deselect devices to stop sharing this folder with.": "Zrušte výběr zařízení, se kterými již nemá být tato složka sdílena.",
+    "Deselect folders to stop sharing with this device.": "Zrušte výběr složek, které se mají přestat sdílet s tímto zařízením.",
    "Device": "Zařízení",
    "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Zařízení „{{name}}“ ({{device}} na {{address}}) se chce připojit. Přidat nové zařízení?",
    "Device ID": "Identifikátor zařízení",
    "Device Identification": "Identifikace zařízení",
    "Device Name": "Název zařízení",
+    "Device is untrusted, enter encryption password": "Zařízení nemá důvěru, zadejte šifrovací heslo.",
    "Device rate limits": "Omezení přenosové rychlosti pro zařízení",
    "Device that last modified the item": "Zařízení, které položku změnilo naposledy",
    "Devices": "Zařízení",
@@ -80,11 +91,16 @@
    "Disabled periodic scanning and disabled watching for changes": "Periodické skenování i sledování změn vypnuto",
    "Disabled periodic scanning and enabled watching for changes": "Periodické skenování vypnuto; sledování změn zapnuto",
    "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Periodické skenování vypnuto; nastavení sledování změn se nezdařilo, opětovný pokus každou 1 min:",
+    "Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).": "Zakazuje porovnávání a synchronizaci souborových oprávnění. To je užitečné na systémech, kde oprávnění souborů chybí, nebo jsou nestandardní (např. FAT, exFAT, Synology, Android).",
    "Discard": "Zahodit",
    "Disconnected": "Odpojeno",
+    "Disconnected (Unused)": "Odpojeno (nepoužité)",
    "Discovered": "Objeveno",
-    "Discovery": "Oznamování",
-    "Discovery Failures": "Nezdary při oznamování",
+    "Discovery": "Objevování",
+    "Discovery Failures": "Nezdary při objevování",
+    "Discovery Status": "Stav objevování",
+    "Dismiss": "OK",
+    "Do not add it to the ignore list, so this notification may recur.": "Nepřidávat k ignorování, takže oznámení se může opakovat.",
    "Do not restore": "Neobnovit",
    "Do not restore all": "Neobnovit nic",
    "Do you want to enable watching for changes for all your folders?": "Chcete zapnout sledování změn pro všechny složky?",
@@ -94,8 +110,9 @@
    "Downloading": "Stahuje se",
    "Edit": "Upravit",
    "Edit Device": "Upravit zařízení",
+    "Edit Device Defaults": "Upravit výchozí hodnoty zařízení",
    "Edit Folder": "Upravit složku",
-    "Editing": "Upravuje se",
+    "Edit Folder Defaults": "Upravit výchozí hodnoty složek",
    "Editing {%path%}.": "Upravuje se {{path}}.",
    "Enable Crash Reporting": "Povolit hlášení pádů",
    "Enable NAT traversal": "Povolit průchod skrze NAT překlad",
@@ -103,26 +120,21 @@
    "Enabled": "Zapnuto",
    "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Zadejte kladné číslo (např. „2.35“) a zvolte jednotku. Procenta znamenají část celkové velikosti úložiště.",
    "Enter a non-privileged port number (1024 - 65535).": "Zadejte číslo neprivilegovaného portu (1024-65535).",
-    "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Zadejte adresy oddělené čárkou („tcp://ip:port“, „tcp://host:port“) nebo „dynamic“ pro automatické zjišťování adres.",
-    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Zadejte adresy oddělené čárkami („tcp://ip:port“, „tcp://host:port“) nebo „dynamic“ pro automatické zjištění adresy.",
+    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Zadejte adresy oddělené čárkami („tcp://ip:port“, „tcp://host:port“) nebo „dynamic“ pro automatické objevení adresy.",
    "Enter ignore patterns, one per line.": "Zadejte vzory toho, co ignorovat – každý na zvlášť řádek.",
    "Enter up to three octal digits.": "Zadejte nanejvýš tři osmičkové číslice.",
    "Error": "Chyba",
    "External File Versioning": "Externí správa verzí souborů",
    "Failed Items": "Nezdařené položky",
-    "Failed to load ignore patterns": "Načtení vzorů ignorovaného se nezdařilo",
+    "Failed to load ignore patterns.": "Načtení vzorů ignorovaného se nezdařilo.",
    "Failed to setup, retrying": "Nastavování se nezdařilo, zkouší se znovu",
    "Failure to connect to IPv6 servers is expected if there is no IPv6 connectivity.": "Je v pořádku, když připojení k IPv6 serverům nezdaří, pokud není k dispozici IPv6 konektivita.",
    "File Pull Order": "Pořadí stahování souborů",
    "File Versioning": "Správa verzí souborů",
-    "File permission bits are ignored when looking for changes. Use on FAT file systems.": "Bity označující přístupová oprávnění k souborům jsou při hledání změn ignorovány. Použijte pro souborové systémy FAT.",
    "Files are moved to .stversions directory when replaced or deleted by Syncthing.": "Při nahrazování nebo mazání aplikací Syncthing jsou původní soubory přesunuty do složky .stversions.",
-    "Files are moved to .stversions folder when replaced or deleted by Syncthing.": "Při nahrazování nebo mazání aplikací Syncthing jsou původní soubory přesunuty do složky .stversions.",
    "Files are moved to date stamped versions in a .stversions directory when replaced or deleted by Syncthing.": "Při nahrazování nebo mazání aplikací Syncthing jsou původní soubory opatřeny časovou značkou a takto označené verze přesunuty do složky .stversions.",
-    "Files are moved to date stamped versions in a .stversions folder when replaced or deleted by Syncthing.": "Při nahrazování nebo mazání aplikací Syncthing jsou původní soubory opatřeny časovou značkou a takto označené verze přesunuty do složky .stversions.",
    "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "Soubory jsou chráněny před změnami na ostatních zařízeních, ale změny provedené z tohoto zařízení budou rozeslány na zbytek clusteru.",
    "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.": "Soubory jsou synchronizovány z clusteru, ale lokální změny nebudou rozesílány na ostatní zařízení.",
-    "Filesystem Notifications": "Oznámení souborového systému",
    "Filesystem Watcher Errors": "Chyby sledování soubor. systému",
    "Filter by date": "Vybrat podle data",
    "Filter by name": "Vybrat podle názvu",
@@ -131,24 +143,28 @@
    "Folder Label": "Jmenovka složky",
    "Folder Path": "Popis umístění složky",
    "Folder Type": "Typ složky",
+    "Folder type \"{%receiveEncrypted%}\" can only be set when adding a new folder.": "Typ složky „{{receiveEncrypted}}“ lze nastavit jen při vytváření nové složky.",
+    "Folder type \"{%receiveEncrypted%}\" cannot be changed after adding the folder. You need to remove the folder, delete or decrypt the data on disk, and add the folder again.": "Typ složky „{{receiveEncrypted}}“ nelze změnit po přidání složky. Je třeba složku odebrat, data na disku vymazat nebo rozšifrovat, a nakonec vytvořit složku znova.",
    "Folders": "Složky",
    "For the following folders an error occurred while starting to watch for changes. It will be retried every minute, so the errors might go away soon. If they persist, try to fix the underlying issue and ask for help if you can't.": "Pokus o spuštění sledování změn v těchto složkách se nezdařil. Bude se to opětovně zkoušet každou minutu, takže se to možná brzo povede. Pokud ne, pokuste se najít příčinu. případně požádejte o pomoc.",
    "Full Rescan Interval (s)": "Interval plného skenu (sek.)",
    "GUI": "Grafické rozhraní",
    "GUI Authentication Password": "Přihlašovací heslo pro GUI",
    "GUI Authentication User": "Přihlašovací jméno pro GUI",
+    "GUI Authentication: Set User and Password": "Ověřování v graf. uživatelském rozhraní: Nastavit uživatele a heslo",
    "GUI Listen Address": "Adresa, na které GUI očekává spojení",
-    "GUI Listen Addresses": "Adresy, na kterých GUI očekává spojení",
    "GUI Theme": "Motiv vzhledu pro GUI",
    "General": "Obecné",
    "Generate": "Vytvořit",
-    "Global Changes": "Globální změny",
-    "Global Discovery": "Globální oznamování",
-    "Global Discovery Servers": "Servery globálního oznamování",
+    "Global Discovery": "Globální objevování",
+    "Global Discovery Servers": "Servery globálního objevování",
    "Global State": "Globální status",
    "Help": "Nápověda",
    "Home page": "Domovská stránka",
    "However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.": "Nicméně Vaše současná nastavení značí, že si nepřejete funkci povolit. Automatické hlášení pádů tedy bylo vypnuto.",
+    "Identification": "Identifikace",
+    "If untrusted, enter encryption password": "V případě nedůvěryhodnosti zadat šifrovací heslo",
+    "If you want to prevent other users on this computer from accessing Syncthing and through it your files, consider setting up authentication.": "Pokud chcete ostatním uživatelům tohoto počítače zabránit v přístupu k Syncthing (a skrze něj tedy ke svým souborům), zvažte nastavení ověřování se.",
    "Ignore": "Ignorovat",
    "Ignore Patterns": "Vzory ignorovaného",
    "Ignore Permissions": "Ignorovat oprávnění",
@@ -161,30 +177,28 @@
    "Introducer": "Zavaděč",
    "Inversion of the given condition (i.e. do not exclude)": "Převrácení dané podmínky (např. nevynechat)",
    "Keep Versions": "Kolik verzí ponechávat",
+    "LDAP": "LDAP",
    "Largest First": "Od největších",
-    "Last File Received": "Poslední přijatý soubor",
    "Last Scan": "Poslední sken",
    "Last seen": "Naposledy spatřen",
-    "Later": "Později",
    "Latest Change": "Poslední změna",
    "Learn more": "Zjistěte více",
    "Limit": "Limit",
+    "Listener Failures": "Selhání při naslouchání",
+    "Listener Status": "Stav naslouchání",
    "Listeners": "Naslouchající",
    "Loading data...": "Načítání dat…",
    "Loading...": "Načítání…",
    "Local Additions": "Místní příbytky",
-    "Local Discovery": "Místní oznamování",
+    "Local Discovery": "Místní objevování",
    "Local State": "Místní status",
    "Local State (Total)": "Místní status (Celkem)",
    "Locally Changed Items": "Lokálně změněné položky",
    "Log": "Záznam událostí",
-    "Log tailing paused. Click here to continue.": "Zaznamenávání událostí pozastaveno. Kliknutím sem v něm bude pokračováno.",
-    "Log tailing paused. Scroll to bottom continue.": "Zaznamenávání událostí pozastaveno. Sjeďte dolů pro pokračování.",
    "Log tailing paused. Scroll to the bottom to continue.": "Zaznamenávání událostí pozastaveno. Sjeďte dolů pro pokračování.",
    "Logs": "Záznamy událostí",
    "Major Upgrade": "Aktualizace hlavní verze",
    "Mass actions": "Hromadné akce",
-    "Master": "Hlavní",
    "Maximum Age": "Maximální časový limit",
    "Metadata Only": "Pouze metadata",
    "Minimum Free Disk Space": "Minimální velikost volného místa na úložišti",
@@ -200,7 +214,7 @@
    "No File Versioning": "Neuchovávat předchozí verze souborů",
    "No files will be deleted as a result of this operation.": "Tato operace nesmaže žádné soubory.",
    "No upgrades": "Žádné aktualizace",
-    "Normal": "Normální",
+    "Not shared": "Nesdílené",
    "Notice": "Oznámení",
    "OK": "OK",
    "Off": "Vypnuta",
@@ -210,19 +224,21 @@
    "Out of Sync": "Nesesynchronizováno",
    "Out of Sync Items": "Nesesynchronizované položky",
    "Outgoing Rate Limit (KiB/s)": "Omezení odchozí rychlosti (KiB/s)",
+    "Override": "Přebít",
    "Override Changes": "Přebít změny na ostatních",
    "Path": "Popis umístění",
    "Path to the folder on the local computer. Will be created if it does not exist. The tilde character (~) can be used as a shortcut for": "Popis umístění složky na tomto počítači. Pokud neexistuje, bude vytvořeno. Znak vlnovky (~) může být použit jako zkratka pro",
    "Path where new auto accepted folders will be created, as well as the default suggested path when adding new folders via the UI. Tilde character (~) expands to {%tilde%}.": "Popis umístění, ve kterém budou vytvářeny nové automaticky přijaté složky a také výchozího při přidávání nových složek v grafickém uživatelském rozhraní. Vlnovka (~) se rozvine na {{tilde}}.",
    "Path where versions should be stored (leave empty for the default .stversions directory in the shared folder).": "Popis umístění, ve kterém ukládat verze (ponechte prázdné pro výchozí podsložku .stversions ve sdílené složce).",
-    "Path where versions should be stored (leave empty for the default .stversions folder in the folder).": "Popis umístění, ve kterém ukládat verze (ponechte prázdné pro výchozí podsložku .stversions ve složce).",
    "Pause": "Pozastavit",
    "Pause All": "Pozastavit vše",
    "Paused": "Pozastaveno",
+    "Paused (Unused)": "Pozastaveno (nepoužité)",
    "Pending changes": "Čekající změny",
    "Periodic scanning at given interval and disabled watching for changes": "Periodické skenování podle zadaného intervalu; sledování změn vypnuto",
    "Periodic scanning at given interval and enabled watching for changes": "Periodické skenování podle zadaného intervalu; sledování změn zapnuto",
    "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Periodické skenování podle zadaného intervalu; nastavení sledování změn se nezdařilo, opětovný pokus každou 1 min: ",
+    "Permanently add it to the ignore list, suppressing further notifications.": "Natrvalo ignorovat, takže oznámení již nebudou přicházet.",
    "Permissions": "Oprávnění",
    "Please consult the release notes before performing a major upgrade.": "Před přechodem na novější hlavní verzi si nejdříve přečtěte poznámky k vydání nové verze.",
    "Please set a GUI Authentication User and Password in the Settings dialog.": "V dialogu Nastavení zadejte uživatelské jméno a heslo pro ověření se v GUI.",
@@ -233,21 +249,22 @@
    "Preview": "Náhled",
    "Preview Usage Report": "Náhled hlášení o využívání",
    "Quick guide to supported patterns": "Rychlá nápověda k podporovaným vzorům",
-    "RAM Utilization": "Využití operační paměti",
    "Random": "Náhodné",
+    "Receive Encrypted": "Přijmout zašifrované",
    "Receive Only": "Pouze přijímací",
+    "Received data is already encrypted": "Přijatá data jsou již zašifrována",
    "Recent Changes": "Nedávné změny",
    "Reduced by ignore patterns": "Redukováno o ignorované vzory",
    "Release Notes": "Poznámky k vydání",
    "Release candidates contain the latest features and fixes. They are similar to the traditional bi-weekly Syncthing releases.": "Kandidáti na vydání obsahují nejnovější změny a opravy. Podobají se tradičním dvoutýdenním vydáním Syncthing.",
    "Remote Devices": "Vzdálená zařízení",
+    "Remote GUI": "Vzdálené GUI",
    "Remove": "Odstranit",
    "Remove Device": "Odebrat zařízení",
    "Remove Folder": "Odebrat složku",
    "Required identifier for the folder. Must be the same on all cluster devices.": "Vyžadován identifikátor složky. Je třeba, aby byl na všech zařízeních clusteru stejný.",
    "Rescan": "Opakovat skenování",
    "Rescan All": "Opakovat skenování všech",
-    "Rescan Interval": "Interval opakování skenování",
    "Rescans": "Opakovaná skenování",
    "Restart": "Restart",
    "Restart Needed": "Je nutný restart",
@@ -257,19 +274,18 @@
    "Resume": "Pokračovat",
    "Resume All": "Pokračovat (vše)",
    "Reused": "Opakovaně použité",
+    "Revert": "Vrátit zpět",
    "Revert Local Changes": "Vrátit lokální změny",
-    "Running": "Probíhá",
    "Save": "Uložit",
    "Scan Time Remaining": "Čas do dokončení skenování",
    "Scanning": "Skenování",
-    "See external versioner help for supported templated command line parameters.": "Pro upřesnění požadovaných parametrů příkazu navštivte nápovědu pro externí správu verzí.",
    "See external versioning help for supported templated command line parameters.": "Podporované šablonové parametry příkazové řádky jsou dostupné v nápovědě k externí správě verzí.",
    "Select All": "Vybrat vše",
    "Select a version": "Vyberte verzi",
    "Select additional devices to share this folder with.": "Vyberte další zařízení pro sdílení s touto složkou.",
+    "Select additional folders to share with this device.": "Vyberte další složky, které mají být sdíleny s tímto zařízením.",
    "Select latest version": "Vybrat nejnovější verzi",
    "Select oldest version": "Vybrat nejstarší verzi",
-    "Select the devices to share this folder with.": "Vybrat zařízení, se kterými sdílet tuto složku.",
    "Select the folders to share with this device.": "Vybrat složky ke sdílení s tímto zařízením.",
    "Send & Receive": "Odesílací a přijímací",
    "Send Only": "Pouze odesílací",
@@ -277,12 +293,14 @@
    "Share": "Sdílet",
    "Share Folder": "Sdílet složku",
    "Share Folders With Device": "Sdílet složky s tímto zařízením",
-    "Share With Devices": "Sdílet se zařízeními",
    "Share this folder?": "Sdílet tuto složku?",
+    "Shared Folders": "Sdílené složky",
    "Shared With": "Sdíleno s",
    "Sharing": "Sdílení",
    "Show ID": "Zobrazit identifikátor",
    "Show QR": "Zobrazit QR kód",
+    "Show detailed discovery status": "Zobrazit detailní stav objevování",
+    "Show detailed listener status": "Zobrazit detailní stav naslouchajících",
    "Show diff with previous version": "Ukázat rozdíl oproti předchozí verzi",
    "Shown instead of Device ID in the cluster status. Will be advertised to other devices as an optional default name.": "Zobrazeno místo identifikátoru zařízení na náhledu stavu clusteru. Bude odesíláno ostatním zařízením jako výchozí název zařízení.",
    "Shown instead of Device ID in the cluster status. Will be updated to the name the device advertises if left empty.": "Zobrazeno místo identifikátoru zařízení na náhledu stavu clusteru. Pokud nebude vyplněno, bude nastaveno na název, který zařízení odesílá.",
@@ -292,7 +310,9 @@
    "Single level wildcard (matches within a directory only)": "Jednoúrovňový zástupný znak (shody pouze uvnitř složky)",
    "Size": "Velikost",
    "Smallest First": "Od nejmenších",
+    "Some discovery methods could not be established for finding other devices or announcing this device:": "Nebyly zajištěny některé metody pro objevování ostatních zařízení nebo oznamování tohoto zařízení:",
    "Some items could not be restored:": "Některé položky nemohly být obnoveny:",
+    "Some listening addresses could not be enabled to accept connections:": "Některé adresy k naslouchání nebylo možné povolit pro příchozí spojení:",
    "Source Code": "Zdrojové kódy",
    "Stable releases and release candidates": "Stabilní vydání a kandidáti na vydání",
    "Stable releases are delayed by about two weeks. During this time they go through testing as release candidates.": "Stabilní vydání jsou opožděna zhruba o dva týdny. Po tuto dobu se testují jako kandidáti na vydání.",
@@ -301,6 +321,7 @@
    "Start Browser": "Otevřít webový prohlížeč",
    "Statistics": "Statistiky",
    "Stopped": "Zastaveno",
+    "Stores and syncs only encrypted data. Folders on all connected devices need to be set up with the same password or be of type \"{%receiveEncrypted%}\" too.": "Ukládá a synchronizuje pouze zašifrovaná data. Složky na všech připojených zařízeních musí mít nastavené stejné heslo a nebo být také typu „{{receiveEncrypted}}“.",
    "Support": "Podpora",
    "Support Bundle": "Balík podpory",
    "Sync Protocol Listen Addresses": "Adresa, na které synchronizační protokol očekává spojení",
@@ -308,6 +329,8 @@
    "Syncthing has been shut down.": "Syncthing bylo vypnuto.",
    "Syncthing includes the following software or portions thereof:": "Syncthing obsahuje následující software nebo jejich část:",
    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing je svobodný a open source software licencovaný jako MPL v2.0.",
+    "Syncthing is listening on the following network addresses for connection attempts from other devices:": "Syncthing naslouchá pro příchozí spojení na následujících síťových adresách:",
+    "Syncthing is not listening for connection attempts from other devices on any address.  Only outgoing connections from this device may work.": "Syncthing nenaslouchá pro příchozí spojení na žádné adrese. Mohou fungovat jen odchozí spojení z tohoto zařízení.",
    "Syncthing is restarting.": "Syncthing se restartuje.",
    "Syncthing is upgrading.": "Syncthing se aktualizuje.",
    "Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.": "Syncthing nyní umožňuje automaticky hlásit vývojářům pády aplikace. Tato funkce je ve výchozím stavu povolena.",
@@ -315,23 +338,29 @@
    "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing má nejspíše problém s provedením vašeho požadavku. Pokud problém přetrvává, obnovte stránku v prohlížeči nebo restartujte Syncthing.",
    "Take me back": "Jít zpět",
    "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.": "Adresa v GUI je potlačena parametry při spuštění. Dokud potlačení trvá, zdejší změny nemají efekt.",
+    "The Syncthing Authors": "Autoři Syncthing",
    "The Syncthing admin interface is configured to allow remote access without a password.": "V nastavení aplikace Syncthing je povoleno vzdálené připojení k administrátorskému rozhraní bez zadání hesla.",
    "The aggregated statistics are publicly available at the URL below.": "Souhrnné statistiky jsou veřejně dostupné na níže uvedené URL.",
+    "The cleanup interval cannot be blank.": "Interval mazání nesmí být prázdný.",
    "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "Nastavení byla uložena, ale nejsou aktivována. Pro aktivaci nového nastavení je třeba Syncthing restartovat.",
    "The device ID cannot be blank.": "Identifikátor zařízení nemůže zůstat nevyplněný.",
    "The device ID to enter here can be found in the \"Actions > Show ID\" dialog on the other device. Spaces and dashes are optional (ignored).": "Identifikátor zařízení, který je třeba vložit, lze nalézt v dialogu „Akce > Zobrazit identifikátor“ na druhém zařízení. Mezery a pomlčky nejsou nutné (budou ignorovány).",
    "The encrypted usage report is sent daily. It is used to track common platforms, folder sizes and app versions. If the reported data set is changed you will be prompted with this dialog again.": "Šifrovaná data o využití jsou zasílána denně. Jsou používána pro zjištění nejobvyklejších platforem, velikosti složek a verzí aplikace. Pokud se rozsah hlášených dat změní, budete opět upozorněni tímto dialogem.",
    "The entered device ID does not look valid. It should be a 52 or 56 character string consisting of letters and numbers, with spaces and dashes being optional.": "Zadaný identifikátor zařízení není platný. Měl by mít 52 nebo 56 znaků a měl by obsahovat písmena a číslice. Mezery a pomlčky jsou nepovinné.",
-    "The first command line parameter is the folder path and the second parameter is the relative path in the folder.": "První parametr příkazové řádky je popis umístění složky, druhý je relativní popis umístění v téže složce.",
    "The folder ID cannot be blank.": "Identifikátor složky nemůže zůstat nevyplněný.",
    "The folder ID must be unique.": "Je třeba, aby se identifikátor složky neopakoval.",
+    "The folder content on other devices will be overwritten to become identical with this device. Files not present here will be deleted on other devices.": "Obsah složky na ostatních zařízeních bude přepsán, aby se stal identickým s tímto zařízením. Soubory, které zde chybí, budou smazány na ostatních zařízeních.",
+    "The folder content on this device will be overwritten to become identical with other devices. Files newly added here will be deleted.": "Obsah složky na tomto zařízení bude přepsán, aby se stal identickým s ostatními zařízeními. Lokálně přidané soubory budou smazány.",
    "The folder path cannot be blank.": "Popis umístění složky nemůže zůstat nevyplněný.",
    "The following intervals are used: for the first hour a version is kept every 30 seconds, for the first day a version is kept every hour, for the first 30 days a version is kept every day, until the maximum age a version is kept every week.": "Jsou použity následující intervaly: za první hodinu jsou ponechány verze pro každých 30 sekund, za první den jsou ponechány verze pro každou hodinu, za prvních 30 dní jsou ponechány verze pro každý den a do nejvyššího nastaveného stáří jsou ponechány verze pro každý týden.",
    "The following items could not be synchronized.": "Následující položky nemohly být synchronizovány.",
    "The following items were changed locally.": "Tyto položky byly změněny lokálně",
+    "The following methods are used to discover other devices on the network and announce this device to be found by others:": "K objevování ostatních zařízení a oznamování tohoto zařízení se používají následující metody:",
+    "The following unexpected items were found.": "Byly nalezeny tyto neočekávané položky.",
+    "The interval must be a positive number of seconds.": "Interval musí být kladný počet sekund.",
+    "The interval, in seconds, for running cleanup in the versions directory. Zero to disable periodic cleaning.": "Interval (v sekundách) pro spouštění čištění ve složce s verzemi. Nula pravidelné čištění vypíná.",
    "The maximum age must be a number and cannot be blank.": "Nejvyšší stáří je třeba zadat v podobě čísla a nemůže být prázdné.",
    "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "Maximální doba pro zachování verze (dny, zapsáním hodnoty 0 bude ponecháno navždy).",
-    "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "Procentuální údaj minimální velikosti volného místa na disku musí být číslo mezi 0 až 100 (včetně).",
    "The number of days must be a number and cannot be blank.": "Je třeba, aby počet dní bylo číslo a nemůže zůstat nevyplněné.",
    "The number of days to keep files in the trash can. Zero means forever.": "Počet dní, po který budou soubory uchovány v koši. Nula znamená navždy.",
    "The number of old versions to keep, per file.": "Počet uchovávaných starších verzí každého ze souborů.",
@@ -340,9 +369,11 @@
    "The rate limit must be a non-negative number (0: no limit)": "Je třeba, aby limit rychlosti bylo kladné číslo (0: bez limitu)",
    "The rescan interval must be a non-negative number of seconds.": "Je třeba, aby interval opakování skenování bylo kladné číslo.",
    "There are no devices to share this folder with.": "Nejsou žádná zařízení, se kterými lze sdílet tuto složku.",
+    "There are no folders to share with this device.": "S tímto zařízením nejsou sdíleny žádné složky.",
    "They are retried automatically and will be synced when the error is resolved.": "Nové pokusy o synchronizaci budou probíhat automaticky a položky budou synchronizovány jakmile bude chyba odstraněna.",
    "This Device": "Toto zařízení",
    "This can easily give hackers access to read and change any files on your computer.": "Toto může útočníkům jednoduše umožnit čtení a úpravy souborů na vašem počítači. ",
+    "This device cannot automatically discover other devices or announce its own address to be found by others.  Only devices with statically configured addresses can connect.": "Toto zařízení nemůže automaticky objevovat ostatní zařízení ani oznamovat ostatním vlastní adresu. Připojit se mohou jen zařízení se staticky nastavenou adresou.",
    "This is a major version upgrade.": "Toto je velká aktualizace.",
    "This setting controls the free space required on the home (i.e., index database) disk.": "Toto nastavení ovládá velikost volného prostoru na hlavním datovém úložišti (to, na kterém je databáze rejstříku).",
    "Time": "Čas",
@@ -353,11 +384,14 @@
    "Unavailable": "Nedostupné",
    "Unavailable/Disabled by administrator or maintainer": "Není k dispozici / vypnuto správcem systému či balíčku",
    "Undecided (will prompt)": "Nerozhodnuto (zeptá se)",
+    "Unexpected Items": "Neočekávané položky",
+    "Unexpected items have been found in this folder.": "V této složce byly nalezeny neočekávané položky.",
    "Unignore": "Přestat ignorovat",
    "Unknown": "Neznámý",
    "Unshared": "Nesdílený",
    "Unshared Devices": "Nesdílená zařízení",
-    "Unused": "Nepoužitý",
+    "Unshared Folders": "Nesdílené složky",
+    "Untrusted": "Bez důvěry",
    "Up to Date": "Aktuální",
    "Updated": "Aktualizováno",
    "Upgrade": "Přechod na novější verzi",
@@ -368,15 +402,15 @@
    "Usage reporting is always enabled for candidate releases.": "Hlášení o používání je pro kandidáty na vydání vždy zapnuto.",
    "Use HTTPS for GUI": "Použít pro grafické rozhraní zabezpečení HTTPS",
    "Use notifications from the filesystem to detect changed items.": "Použít oznamování soubor. systému pro nalezení změněných položek.",
-    "Variable Size Blocks": "Bloky proměnlivé velikosti",
-    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Bloky proměnlivé velikosti (také „velké bloky“) jsou účinnější pro velké soubory.",
+    "Username/Password has not been set for the GUI authentication. Please consider setting it up.": "Pro ověřování v grafickém uživatelském rozhraní nebylo nastaveno uživatelské jméno / heslo. Prosím zvažte nastavení nějakého.",
    "Version": "Verze",
    "Versions": "Verze",
    "Versions Path": "Popis umístění verzí",
    "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Verze jsou automaticky smazány, pokud jsou starší než maximální časový limit nebo překročí počet souborů povolených pro interval.",
+    "Waiting to Clean": "Čeká se na čistění",
    "Waiting to Scan": "Čekání na skenování",
    "Waiting to Sync": "Čekání na synchronizaci",
-    "Waiting to scan": "Čekání na skenování",
+    "Warning": "Varování",
    "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Varování, tento popis umístění je nadřazenou složkou existující „{{otherFolder}}“.",
    "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Varování, tento popis umístění je nadřazenou složkou existující „{{otherFolderLabel}}“ ({{otherFolder}}).",
    "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Varování: toto umístění je podsložkou existující „{{otherFolder}}“.",
@@ -391,15 +425,18 @@
    "You can also select one of these nearby devices:": "Také můžete vybrat jedno z těchto okolních zařízení:",
    "You can change your choice at any time in the Settings dialog.": "Vaši volbu můžete kdykoliv změnit v dialogu nastavení.",
    "You can read more about the two release channels at the link below.": "O kandidátech na vydání si můžete přečíst více v odkazu níže.",
-    "You have no ignored devices.": "Nemáte žádná ignorovaná zařízení",
+    "You have no ignored devices.": "Nemáte žádná ignorovaná zařízení.",
    "You have no ignored folders.": "Nemáte žádné ignorované složky.",
    "You have unsaved changes. Do you really want to discard them?": "Máte neuložené změny. Opravdu je chcete zahodit?",
    "You must keep at least one version.": "Je třeba ponechat alespoň jednu verzi.",
+    "You should never add or change anything locally in a \"{%receiveEncrypted%}\" folder.": "Ve složce typu „{{receiveEncrypted}}“ byste neměli lokálně nic měnit ani vytvářet.",
    "days": "dní",
-    "directories": "složek",
+    "directories": "složky",
    "files": "souborů",
    "full documentation": "úplná dokumentace",
    "items": "položky",
+    "seconds": "sekund",
    "{%device%} wants to share folder \"{%folder%}\".": "{{device}} chce sdílet složku „{{folder}}“.",
-    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} chce sdílet složku „{{folderlabel}}“ ({{folder}})."
+    "{%device%} wants to share folder \"{%folderlabel%}\" ({%folder%}).": "{{device}} chce sdílet složku „{{folderlabel}}“ ({{folder}}).",
+    "{%reintroducer%} might reintroduce this device.": "{{reintroducer}} může toto zařízení znovu uvést."
 }
--- a/Show More
+++ b/Show More