go.mod: Update AudriusButkevicius/pfilter (fixes #5820)

This adds a 10s timeout on closing the db and additionally cancels active
db iterators and waits for them to terminate before closing the db.

.github/SECURITY.md

@@ -0,0 +1,48 @@
+## 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.
+
+```
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1
+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+=No/v
+-----END PGP PUBLIC KEY BLOCK-----
+```

.golangci.yml

@@ -1,5 +1,20 @@
+linters-settings:
+  maligned:
+    suggest-new: true
+
+linters:
+  enable-all: true
+  disable:
+    - goimports
+    - depguard
+    - lll
+    - gochecknoinits
+    - gochecknoglobals
+    - gofmt
+    - scopelint
+
 service:
-  golangci-lint-version: 1.13.x
+  golangci-lint-version: 1.16.x
   prepare:
+    - GO111MODULE=on go mod vendor
     - go run build.go assets
-    - GO111MODULE=on go mod vendor

AUTHORS

@@ -24,12 +24,13 @@ andresvia <andres.via@gmail.com>
 Andrew Dunham (andrew-d) <andrew@du.nham.ca>
 Andrew Rabert (nvllsvm) <ar@nullsum.net> <6550543+nvllsvm@users.noreply.github.com>
 Andrey D (scienmind) <scintertech@cryptolab.net> <scienmind@users.noreply.github.com>
+André Colomb (acolomb) <src@andre.colomb.de> <github.com@andre.colomb.de>
 andyleap <andyleap@gmail.com>
 Antoine Lamielle (0x010C) <antoine.lamielle@0x010c.fr> <gh@0x010c.fr>
 Antony Male (canton7) <antony.male@gmail.com>
 Aranjedeath <Aranjedeath@users.noreply.github.com>
 Arthur Axel fREW Schmidt (frioux) <frew@afoolishmanifesto.com> <frioux@gmail.com>
-Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com>
+Audrius Butkevicius (AudriusButkevicius) <audrius.butkevicius@gmail.com> <github@audrius.rocks>
 BAHADIR YILMAZ <bahadiryilmaz32@gmail.com>
 Bart De Vries (mogwa1) <devriesb@gmail.com>
 Ben Curthoys (bencurthoys) <ben@bencurthoys.com>
@@ -62,6 +63,8 @@ Darshil Chanpura (dtchanpura) <dtchanpura@gmail.com> <dcprime314@gmail.com>
 David Rimmer (dinosore) <dinosore@dbrsoftware.co.uk>
 Denis A. (dva) <denisva@gmail.com>
 Dennis Wilson (snnd) <dw@risu.io>
+dependabot-preview[bot] <dependabot-preview[bot]@users.noreply.github.com>
+dependabot[bot] <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>
@@ -105,6 +108,7 @@ Jonas Thelemann <e-mail@jonas-thelemann.de>
 Jonathan Cross <jcross@gmail.com>
 Jose Manuel Delicado (jmdaweb) <jmdaweb@hotmail.com> <jmdaweb@users.noreply.github.com>
 Jörg Thalheim <Mic92@users.noreply.github.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>
@@ -140,12 +144,14 @@ Michael Ploujnikov (plouj) <ploujj@gmail.com>
 Michael Tilli (pyfisch) <pyfisch@gmail.com>
 Mike Boone <mike@boonedocks.net>
 MikeLund <MikeLund@users.noreply.github.com>
+Mingxuan Lin <gdlmx@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>
 Niels Peter Roest (Niller303) <nielsproest@hotmail.com> <seje.niels@hotmail.com>
 Nils Jakobi (thunderstorm99) <jakobi.nils@gmail.com>
+Nitroretro <43112364+Nitroretro@users.noreply.github.com>
 NoLooseEnds <jon.koslung@gmail.com>
 otbutz <tbutz@optitool.de>
 Oyebanji Jacob Mayowa <oyebanji05@gmail.com>
@@ -183,6 +189,7 @@ Tim Abell (timabell) <tim@timwise.co.uk>
 Tim Howes (timhowes) <timhowes@berkeley.edu>
 Tobias Nygren (tnn2) <tnn@nygren.pp.se>
 Tobias Tom (tobiastom) <t.tom@succont.de>
+Tom Jakubowski <tom@crystae.net>
 Tomas Cerveny (kozec) <kozec@kozec.com>
 Tommy Thorn <tommy-github-email@thorn.ws>
 Tully Robinson (tojrobinson) <tully@tojr.org>

Dockerfile

@@ -17,16 +17,11 @@ VOLUME ["/var/syncthing"]
 RUN apk add --no-cache ca-certificates su-exec
 
 COPY --from=builder /src/syncthing /bin/syncthing
+COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh
 
 ENV PUID=1000 PGID=1000
 
 HEALTHCHECK --interval=1m --timeout=10s \
   CMD nc -z localhost 8384 || exit 1
 
-ENTRYPOINT \
-  chown "${PUID}:${PGID}" /var/syncthing \
-  && su-exec "${PUID}:${PGID}" \
-     env HOME=/var/syncthing \
-     /bin/syncthing \
-       -home /var/syncthing/config \
-       -gui-address 0.0.0.0:8384
+ENTRYPOINT ["/bin/entrypoint.sh", "-home", "/var/syncthing/config", "-gui-address", "0.0.0.0:8384"]

README.md

@@ -2,7 +2,6 @@
 
 ---
 
-[![Latest Downloads](https://img.shields.io/badge/latest-downloads-brightgreen.svg?style=flat-square)](https://build.syncthing.net/latest/)
 [![Latest Linux & Cross Build](https://img.shields.io/teamcity/https/build.syncthing.net/s/Syncthing_BuildLinuxCross.svg?style=flat-square&label=linux+%26+cross+build)](https://build.syncthing.net/viewType.html?buildTypeId=Syncthing_BuildLinuxCross&guest=1)
 [![Latest Windows Build](https://img.shields.io/teamcity/https/build.syncthing.net/s/Syncthing_BuildWindows.svg?style=flat-square&label=windows+build)](https://build.syncthing.net/viewType.html?buildTypeId=Syncthing_BuildWindows&guest=1)
 [![Latest Mac Build](https://img.shields.io/teamcity/https/build.syncthing.net/s/Syncthing_BuildMac.svg?style=flat-square&label=mac+build)](https://build.syncthing.net/viewType.html?buildTypeId=Syncthing_BuildMac&guest=1)

build.go

@@ -348,7 +348,7 @@ func test(pkgs ...string) {
 	}
 
 	if coverage {
-		args = append(args, "-covermode", "atomic", "-coverprofile", "coverage.txt")
+		args = append(args, "-covermode", "atomic", "-coverprofile", "coverage.txt", "-coverpkg", strings.Join(pkgs, ","))
 	}
 
 	runPrint(goCmd, append(args, pkgs...)...)

cmd/stcrashreceiver/sentry.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 main
+
+import (
+	"bytes"
+	"errors"
+	"io/ioutil"
+	"regexp"
+	"strings"
+
+	raven "github.com/getsentry/raven-go"
+	"github.com/maruel/panicparse/stack"
+)
+
+const reportServer = "https://crash.syncthing.net/report/"
+
+func sendReport(dsn, path string, report []byte) error {
+	pkt, err := parseReport(path, report)
+	if err != nil {
+		return err
+	}
+
+	cli, err := raven.New(dsn)
+	if err != nil {
+		return err
+	}
+
+	// The client sets release and such on the packet before sending, in the
+	// misguided idea that it knows this better than than the packet we give
+	// it. So we copy the values from the packet to the client first...
+	cli.SetRelease(pkt.Release)
+	cli.SetEnvironment(pkt.Environment)
+
+	_, errC := cli.Capture(pkt, nil)
+	return <-errC
+}
+
+func parseReport(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")
+	}
+
+	version, err := parseVersion(string(parts[0]))
+	if err != nil {
+		return nil, err
+	}
+	report = parts[1]
+
+	foundPanic := false
+	var subjectLine []byte
+	for {
+		parts = bytes.SplitN(report, []byte("\n"), 2)
+		if len(parts) != 2 {
+			return nil, errors.New("no panic line found")
+		}
+
+		line := parts[0]
+		report = parts[1]
+
+		if foundPanic {
+			// The previous line was our "Panic at ..." header. We are now
+			// at the beginning of the real panic trace and this is our
+			// subject line.
+			subjectLine = line
+			break
+		} else if bytes.HasPrefix(line, []byte("Panic at")) {
+			foundPanic = true
+		}
+	}
+
+	r := bytes.NewReader(report)
+	ctx, err := stack.ParseDump(r, ioutil.Discard, false)
+	if err != nil {
+		return nil, err
+	}
+
+	var trace raven.Stacktrace
+	for _, gr := range ctx.Goroutines {
+		if gr.First {
+			trace.Frames = make([]*raven.StacktraceFrame, len(gr.Stack.Calls))
+			for i, sc := range gr.Stack.Calls {
+				trace.Frames[len(trace.Frames)-1-i] = &raven.StacktraceFrame{
+					Function: sc.Func.Name(),
+					Module:   sc.Func.PkgName(),
+					Filename: sc.SrcPath,
+					Lineno:   sc.Line,
+				}
+			}
+			break
+		}
+	}
+
+	pkt := &raven.Packet{
+		Message:  string(subjectLine),
+		Platform: "go",
+		Release:  version.tag,
+		Tags: raven.Tags{
+			raven.Tag{Key: "version", Value: version.version},
+			raven.Tag{Key: "tag", Value: version.tag},
+			raven.Tag{Key: "commit", Value: version.commit},
+			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},
+	}
+
+	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]+)`)
+
+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"
+}
+
+func parseVersion(line string) (version, error) {
+	m := longVersionRE.FindStringSubmatch(line)
+	if len(m) == 0 {
+		return version{}, errors.New("unintelligeble version string")
+	}
+
+	v := version{
+		version:  m[1],
+		codename: m[2],
+		runtime:  m[3],
+		goos:     m[4],
+		goarch:   m[5],
+		builder:  m[6],
+	}
+	parts := strings.Split(v.version, "+")
+	v.tag = parts[0]
+	if len(parts) > 1 {
+		fields := strings.Split(parts[1], "-")
+		if len(fields) >= 2 && strings.HasPrefix(fields[1], "g") {
+			v.commit = fields[1][1:]
+		}
+	}
+
+	return v, nil
+}

cmd/stcrashreceiver/sentry_test.go

@@ -0,0 +1,64 @@
+// 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 (
+	"fmt"
+	"io/ioutil"
+	"testing"
+)
+
+func TestParseVersion(t *testing.T) {
+	cases := []struct {
+		longVersion string
+		parsed      version
+	}{
+		{
+			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`,
+			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",
+			},
+		},
+	}
+
+	for _, tc := range cases {
+		v, err := parseVersion(tc.longVersion)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		if v != tc.parsed {
+			t.Error(v)
+		}
+	}
+}
+
+func TestParseReport(t *testing.T) {
+	bs, err := ioutil.ReadFile("_testdata/panic.log")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	pkt, err := parseReport("1/2/345", bs)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	bs, err = pkt.JSON()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	fmt.Printf("%s\n", bs)
+}

cmd/stcrashreceiver/stcrashreceiver.go

@@ -0,0 +1,135 @@
+// 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 (
+	"flag"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"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
+}
+
+func (r *crashReceiver) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	// The final path component should be a SHA256 hash in hex, so 64 hex
+	// characters. We don't care about case on the request but use lower
+	// case internally.
+	base := strings.ToLower(path.Base(req.URL.Path))
+	if len(base) != 64 {
+		http.Error(w, "Bad request", http.StatusBadRequest)
+		return
+	}
+	for _, c := range base {
+		if c >= 'a' && c <= 'f' {
+			continue
+		}
+		if c >= '0' && c <= '9' {
+			continue
+		}
+		http.Error(w, "Bad request", http.StatusBadRequest)
+		return
+	}
+
+	switch req.Method {
+	case http.MethodHead:
+		r.serveHead(base, w, req)
+	case http.MethodPut:
+		r.servePut(base, w, req)
+	default:
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+	}
+}
+
+// serveHead responds to HEAD requests by checking if the named report
+// already exists in the system.
+func (r *crashReceiver) serveHead(base string, w http.ResponseWriter, _ *http.Request) {
+	path := filepath.Join(r.dirFor(base), base)
+	if _, err := os.Lstat(path); err != nil {
+		http.Error(w, "Not found", http.StatusNotFound)
+	}
+	// 200 OK
+}
+
+// servePut accepts and stores the given report.
+func (r *crashReceiver) servePut(base string, w http.ResponseWriter, req *http.Request) {
+	path := filepath.Join(r.dirFor(base), base)
+	fullPath := filepath.Join(r.dir, path)
+
+	// Ensure the destination directory exists
+	if err := os.MkdirAll(filepath.Dir(fullPath), 0755); err != nil {
+		log.Printf("Creating directory for report %s: %v", base, err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	// Read at most maxRequestSize of report data.
+	log.Println("Receiving report", base)
+	lr := io.LimitReader(req.Body, maxRequestSize)
+	bs, err := ioutil.ReadAll(lr)
+	if err != nil {
+		log.Println("Reading report:", err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	// Create an output file
+	err = ioutil.WriteFile(fullPath, bs, 0644)
+	if err != nil {
+		log.Printf("Creating file for report %s: %v", base, err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	// Send the report to Sentry
+	if r.dsn != "" {
+		go func() {
+			// There's no need for the client to have to wait for this part.
+			if err := sendReport(r.dsn, path, bs); err != nil {
+				log.Println("Failed to send report:", err)
+			}
+		}()
+	}
+}
+
+// 01234567890abcdef... => 01/23
+func (r *crashReceiver) dirFor(base string) string {
+	return filepath.Join(base[0:2], base[2:4])
+}

cmd/strelaypoolsrv/gui/index.html

@@ -193,9 +193,9 @@
   <script>
   angular.module('syncthing', [
   ])
-  .config(function($httpProvider) {
+  .config(['$httpProvider', function($httpProvider) {
     $httpProvider.defaults.timeout = 5000;
-  })
+  }])
   .filter('bytes', function() {
     return function(bytes, precision) {
       if (isNaN(parseFloat(bytes)) || !isFinite(bytes)) return '-';

cmd/strelaypoolsrv/main.go

@@ -13,7 +13,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"log"
-	"math/rand"
 	"mime"
 	"net"
 	"net/http"
@@ -29,6 +28,7 @@ import (
 	"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/rand"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/tlsutil"
@@ -370,10 +370,7 @@ func handleGetRequest(w http.ResponseWriter, r *http.Request) {
 	mut.RUnlock()
 
 	// Shuffle
-	for i := range relays {
-		j := rand.Intn(i + 1)
-		relays[i], relays[j] = relays[j], relays[i]
-	}
+	rand.Shuffle(relays)
 
 	json.NewEncoder(w).Encode(map[string][]*relay{
 		"relays": relays,

cmd/syncthing/crash_reporting.go

@@ -0,0 +1,152 @@
+// 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"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/syncthing/syncthing/lib/sha256"
+)
+
+const (
+	headRequestTimeout = 10 * time.Second
+	putRequestTimeout  = time.Minute
+)
+
+// uploadPanicLogs attempts to upload all the panic logs in the named
+// directory to the crash reporting server as urlBase. Uploads are attempted
+// with the newest log first.
+//
+// This can can block for a long time. The context can set a final deadline
+// for this.
+func uploadPanicLogs(ctx context.Context, urlBase, dir string) {
+	files, err := filepath.Glob(filepath.Join(dir, "panic-*.log"))
+	if err != nil {
+		l.Warnln("Failed to list panic logs:", err)
+		return
+	}
+
+	sort.Sort(sort.Reverse(sort.StringSlice(files)))
+	for _, file := range files {
+		if strings.Contains(file, ".reported.") {
+			// We've already sent this file. It'll be cleaned out at some
+			// point.
+			continue
+		}
+
+		if err := uploadPanicLog(ctx, urlBase, file); err != nil {
+			l.Warnln("Reporting crash:", err)
+		} else {
+			// Rename the log so we don't have to try to report it again. This
+			// succeeds, or it does not. There is no point complaining about it.
+			_ = os.Rename(file, strings.Replace(file, ".log", ".reported.log", 1))
+		}
+	}
+}
+
+// uploadPanicLog attempts to upload the named panic log to the crash
+// reporting server at urlBase. The panic ID is constructed as the sha256 of
+// the log contents. A HEAD request is made to see if the log has already
+// been reported. If not, a PUT is made with the log contents.
+func uploadPanicLog(ctx context.Context, urlBase, file string) error {
+	data, err := ioutil.ReadFile(file)
+	if err != nil {
+		return err
+	}
+
+	// Remove log lines, for privacy.
+	data = filterLogLines(data)
+
+	hash := fmt.Sprintf("%x", sha256.Sum256(data))
+	l.Infof("Reporting crash found in %s (report ID %s) ...\n", filepath.Base(file), hash[:8])
+
+	url := fmt.Sprintf("%s/%s", urlBase, hash)
+	headReq, err := http.NewRequest(http.MethodHead, url, nil)
+	if err != nil {
+		return err
+	}
+
+	// Set a reasonable timeout on the HEAD request
+	headCtx, headCancel := context.WithTimeout(ctx, headRequestTimeout)
+	defer headCancel()
+	headReq = headReq.WithContext(headCtx)
+
+	resp, err := http.DefaultClient.Do(headReq)
+	if err != nil {
+		return err
+	}
+	resp.Body.Close()
+	if resp.StatusCode == http.StatusOK {
+		// It's known, we're done
+		return nil
+	}
+
+	putReq, err := http.NewRequest(http.MethodPut, url, bytes.NewReader(data))
+	if err != nil {
+		return err
+	}
+
+	// Set a reasonable timeout on the PUT request
+	putCtx, putCancel := context.WithTimeout(ctx, putRequestTimeout)
+	defer putCancel()
+	putReq = putReq.WithContext(putCtx)
+
+	resp, err = http.DefaultClient.Do(putReq)
+	if err != nil {
+		return err
+	}
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("upload: %s", resp.Status)
+	}
+
+	return nil
+}
+
+// filterLogLines returns the data without any log lines between the first
+// line and the panic trace. This is done in-place: the original data slice
+// is destroyed.
+func filterLogLines(data []byte) []byte {
+	filtered := data[:0]
+	matched := false
+	for _, line := range bytes.Split(data, []byte("\n")) {
+		switch {
+		case !matched && bytes.HasPrefix(line, []byte("Panic ")):
+			// This begins the panic trace, set the matched flag and append.
+			matched = true
+			fallthrough
+		case len(filtered) == 0 || matched:
+			// This is the first line or inside the panic trace.
+			if len(filtered) > 0 {
+				// We add the newline before rather than after because
+				// bytes.Split sees the \n as *separator* and not line
+				// ender, so ir will generate a last empty line that we
+				// don't really want. (We want to keep blank lines in the
+				// middle of the trace though.)
+				filtered = append(filtered, '\n')
+			}
+			// Remove the device ID prefix. The "plus two" stuff is because
+			// the line will look like "[foo] whatever" and the end variable
+			// will end up pointing at the ] and we want to step over that
+			// and the following space.
+			if end := bytes.Index(line, []byte("]")); end > 1 && end < len(line)-2 && bytes.HasPrefix(line, []byte("[")) {
+				line = line[end+2:]
+			}
+			filtered = append(filtered, line...)
+		}
+	}
+	return filtered
+}

cmd/syncthing/crash_reporting_test.go

@@ -0,0 +1,37 @@
+// 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"
+	"testing"
+)
+
+func TestFilterLogLines(t *testing.T) {
+	in := []byte(`[ABCD123] syncthing version whatever
+here is more log data
+and more
+...
+and some more
+yet more
+Panic detected at like right now
+here is panic data
+and yet more panic stuff
+`)
+
+	filtered := []byte(`syncthing version whatever
+Panic detected at like right now
+here is panic data
+and yet more panic stuff
+`)
+
+	result := filterLogLines(in)
+	if !bytes.Equal(result, filtered) {
+		t.Logf("%q\n", result)
+		t.Error("it should have been filtered")
+	}
+}

cmd/syncthing/main.go

@@ -929,6 +929,17 @@ func syncthingMain(runtimeOptions RuntimeOptions) {
 
 	mainService.Stop()
 
+	done := make(chan struct{})
+	go func() {
+		ldb.Close()
+		close(done)
+	}()
+	select {
+	case <-done:
+	case <-time.After(10 * time.Second):
+		l.Warnln("Database failed to stop within 10s")
+	}
+
 	l.Infoln("Exiting")
 
 	if runtimeOptions.cpuProfile {

cmd/syncthing/monitor.go

@@ -8,6 +8,7 @@ package main
 
 import (
 	"bufio"
+	"context"
 	"io"
 	"os"
 	"os/exec"
@@ -33,6 +34,8 @@ const (
 	loopThreshold         = 60 * time.Second
 	logFileAutoCloseDelay = 5 * time.Second
 	logFileMaxOpenTime    = time.Minute
+	panicUploadMaxWait    = 30 * time.Second
+	panicUploadNoticeWait = 10 * time.Second
 )
 
 func monitorMain(runtimeOptions RuntimeOptions) {
@@ -72,6 +75,8 @@ func monitorMain(runtimeOptions RuntimeOptions) {
 	childEnv := childEnv()
 	first := true
 	for {
+		maybeReportPanics()
+
 		if t := time.Since(restarts[0]); t < loopThreshold {
 			l.Warnf("%d restarts in %v; not retrying further", countRestarts, t)
 			os.Exit(exitError)
@@ -173,6 +178,13 @@ func copyStderr(stderr io.Reader, dst io.Writer) {
 	br := bufio.NewReader(stderr)
 
 	var panicFd *os.File
+	defer func() {
+		if panicFd != nil {
+			_ = panicFd.Close()
+			maybeReportPanics()
+		}
+	}()
+
 	for {
 		line, err := br.ReadString('\n')
 		if err != nil {
@@ -430,3 +442,39 @@ func childEnv() []string {
 	env = append(env, "STMONITORED=yes")
 	return env
 }
+
+// maybeReportPanics tries to figure out if crash reporting is on or off,
+// and reports any panics it can find if it's enabled. We spend at most
+// panicUploadMaxWait uploading panics...
+func maybeReportPanics() {
+	// Try to get a config to see if/where panics should be reported.
+	cfg, err := loadOrDefaultConfig()
+	if err != nil {
+		l.Warnln("Couldn't load config; not reporting crash")
+		return
+	}
+
+	// Bail if we're not supposed to report panics.
+	opts := cfg.Options()
+	if !opts.CREnabled {
+		return
+	}
+
+	// Set up a timeout on the whole operation.
+	ctx, cancel := context.WithTimeout(context.Background(), panicUploadMaxWait)
+	defer cancel()
+
+	// Print a notice if the upload takes a long time.
+	go func() {
+		select {
+		case <-ctx.Done():
+			return
+		case <-time.After(panicUploadNoticeWait):
+			l.Warnln("Uploading crash reports is taking a while, please wait...")
+		}
+	}()
+
+	// Report the panics.
+	dir := locations.GetBaseDir(locations.ConfigBaseDir)
+	uploadPanicLogs(ctx, opts.CRURL, dir)
+}

cmd/ursrv/analytics.go

@@ -24,10 +24,10 @@ type analyticList []analytic
 
 func (l analyticList) Less(a, b int) bool {
 	if l[a].Key == "Others" {
-		return true
+		return false
 	}
 	if l[b].Key == "Others" {
-		return false
+		return true
 	}
 	return l[b].Count < l[a].Count // inverse
 }

cmd/ursrv/formatting.go

@@ -21,11 +21,14 @@ const (
 )
 
 func number(ntype NumberType, v float64) string {
-	if ntype == NumberDuration {
+	switch ntype {
+	case NumberMetric:
+		return metric(v)
+	case NumberDuration:
 		return duration(v)
-	} else if ntype == NumberBinary {
+	case NumberBinary:
 		return binary(v)
-	} else {
+	default:
 		return metric(v)
 	}
 }

cmd/ursrv/main.go

@@ -33,20 +33,41 @@ import (
 )
 
 var (
-	useHTTP          = os.Getenv("UR_USE_HTTP") != ""
-	debug            = os.Getenv("UR_DEBUG") != ""
-	keyFile          = getEnvDefault("UR_KEY_FILE", "key.pem")
-	certFile         = getEnvDefault("UR_CRT_FILE", "crt.pem")
-	dbConn           = getEnvDefault("UR_DB_URL", "postgres://user:password@localhost/ur?sslmode=disable")
-	listenAddr       = getEnvDefault("UR_LISTEN", "0.0.0.0:8443")
-	geoIPPath        = getEnvDefault("UR_GEOIP", "GeoLite2-City.mmdb")
-	tpl              *template.Template
-	compilerRe       = regexp.MustCompile(`\(([A-Za-z0-9()., -]+) \w+-\w+(?:| android| default)\) ([\w@.-]+)`)
-	progressBarClass = []string{"", "progress-bar-success", "progress-bar-info", "progress-bar-warning", "progress-bar-danger"}
-	featureOrder     = []string{"Various", "Folder", "Device", "Connection", "GUI"}
-	knownVersions    = []string{"v2", "v3"}
+	useHTTP            = os.Getenv("UR_USE_HTTP") != ""
+	debug              = os.Getenv("UR_DEBUG") != ""
+	keyFile            = getEnvDefault("UR_KEY_FILE", "key.pem")
+	certFile           = getEnvDefault("UR_CRT_FILE", "crt.pem")
+	dbConn             = getEnvDefault("UR_DB_URL", "postgres://user:password@localhost/ur?sslmode=disable")
+	listenAddr         = getEnvDefault("UR_LISTEN", "0.0.0.0:8443")
+	geoIPPath          = getEnvDefault("UR_GEOIP", "GeoLite2-City.mmdb")
+	tpl                *template.Template
+	compilerRe         = regexp.MustCompile(`\(([A-Za-z0-9()., -]+) \w+-\w+(?:| android| default)\) ([\w@.-]+)`)
+	progressBarClass   = []string{"", "progress-bar-success", "progress-bar-info", "progress-bar-warning", "progress-bar-danger"}
+	featureOrder       = []string{"Various", "Folder", "Device", "Connection", "GUI"}
+	knownVersions      = []string{"v2", "v3"}
+	knownDistributions = []distributionMatch{
+		// Maps well known builders to the official distribution method that
+		// they represent
+		{regexp.MustCompile("android-.*teamcity@build.syncthing.net"), "Google Play"},
+		{regexp.MustCompile("teamcity@build.syncthing.net"), "GitHub"},
+		{regexp.MustCompile("deb@build.syncthing.net"), "APT"},
+		{regexp.MustCompile("docker@syncthing.net"), "Docker Hub"},
+		{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("@debian"), "Debian (3rd party)"},
+		{regexp.MustCompile("@fedora"), "Fedora (3rd party)"},
+		{regexp.MustCompile(`\bbrew@`), "Homebrew (3rd party)"},
+		{regexp.MustCompile("."), "Others"},
+	}
 )
 
+type distributionMatch struct {
+	matcher      *regexp.Regexp
+	distribution string
+}
+
 var funcs = map[string]interface{}{
 	"commatize":  commatize,
 	"number":     number,
@@ -705,7 +726,8 @@ func main() {
 	if useHTTP {
 		listener, err = net.Listen("tcp", listenAddr)
 	} else {
-		cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+		var cert tls.Certificate
+		cert, err = tls.LoadX509KeyPair(certFile, keyFile)
 		if err != nil {
 			log.Fatalln("tls:", err)
 		}
@@ -1001,6 +1023,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 	var uptime []int
 	var compilers []string
 	var builders []string
+	var distributions []string
 	locations := make(map[location]int)
 	countries := make(map[string]int)
 
@@ -1070,10 +1093,19 @@ func getReport(db *sql.DB) map[string]interface{} {
 		nodes++
 		versions = append(versions, transformVersion(rep.Version))
 		platforms = append(platforms, rep.Platform)
+
 		if m := compilerRe.FindStringSubmatch(rep.LongVersion); len(m) == 3 {
 			compilers = append(compilers, m[1])
 			builders = append(builders, m[2])
+		loop:
+			for _, d := range knownDistributions {
+				if d.matcher.MatchString(rep.LongVersion) {
+					distributions = append(distributions, d.distribution)
+					break loop
+				}
+			}
 		}
+
 		if rep.NumFolders > 0 {
 			numFolders = append(numFolders, rep.NumFolders)
 		}
@@ -1366,6 +1398,7 @@ func getReport(db *sql.DB) map[string]interface{} {
 	r["platforms"] = group(byPlatform, analyticsFor(platforms, 2000), 5)
 	r["compilers"] = group(byCompiler, analyticsFor(compilers, 2000), 5)
 	r["builders"] = analyticsFor(builders, 12)
+	r["distributions"] = analyticsFor(distributions, 10)
 	r["featureOrder"] = featureOrder
 	r["locations"] = locations
 	r["contries"] = countryList
@@ -1373,15 +1406,6 @@ func getReport(db *sql.DB) map[string]interface{} {
 	return r
 }
 
-func ensureDir(dir string, mode int) {
-	fi, err := os.Stat(dir)
-	if os.IsNotExist(err) {
-		os.MkdirAll(dir, 0700)
-	} else if mode >= 0 && err == nil && int(fi.Mode()&0777) != mode {
-		os.Chmod(dir, os.FileMode(mode))
-	}
-}
-
 var (
 	plusRe  = regexp.MustCompile(`\+.*$`)
 	plusStr = "(+dev)"

cmd/ursrv/static/index.html

@@ -506,6 +506,27 @@ found in the LICENSE file.
         </table>
       </div>
 
+      <div class="col-md-6">
+        <table class="table table-striped">
+          <thead>
+            <tr>
+              <th>Distribution Channel</th>
+              <th class="text-right">Devices</th>
+              <th class="text-right">Share</th>
+            </tr>
+          </thead>
+          <tbody>
+            {{range .distributions}}
+            <tr>
+              <td>{{.Key}}</td>
+              <td class="text-right">{{.Count}}</td>
+              <td class="text-right">{{.Percentage | printf "%.01f"}}%</td>
+            </tr>
+            {{end}}
+          </tbody>
+        </table>
+      </div>
+
     </div>
 
     <div class="row">

etc/linux-systemd/user/syncthing.service

@@ -9,8 +9,6 @@ SuccessExitStatus=3 4
 RestartForceExitStatus=3 4
 
 # Hardening
-ProtectSystem=full
-PrivateTmp=true
 SystemCallArchitectures=native
 MemoryDenyWriteExecute=true
 NoNewPrivileges=true

go.mod

@@ -2,46 +2,49 @@ module github.com/syncthing/syncthing
 
 require (
 	github.com/AudriusButkevicius/go-nat-pmp v0.0.0-20160522074932-452c97607362
+	github.com/AudriusButkevicius/pfilter v0.0.0-20190627213056-c55ef6137fc6
 	github.com/AudriusButkevicius/recli v0.0.5
 	github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e
 	github.com/calmh/du v1.0.1
 	github.com/calmh/xdr v1.1.0
+	github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d
+	github.com/certifi/gocertifi v0.0.0-20190506164543-d2eda7129713 // indirect
 	github.com/chmduquesne/rollinghash v0.0.0-20180912150627-a60f8e7142b5
 	github.com/d4l3k/messagediff v1.2.1
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568
+	github.com/getsentry/raven-go v0.2.0
 	github.com/gobwas/glob v0.0.0-20170212200151-51eb1ee00b6d
-	github.com/gogo/protobuf v1.2.0
+	github.com/gogo/protobuf v1.2.1
 	github.com/golang/groupcache v0.0.0-20171101203131-84a468cf14b4
-	github.com/golang/snappy v0.0.0-20170215233205-553a64147049 // indirect
 	github.com/jackpal/gateway v0.0.0-20161225004348-5795ac81146e
 	github.com/kballard/go-shellquote v0.0.0-20170619183022-cd60e84ee657
 	github.com/kr/pretty v0.1.0 // indirect
-	github.com/lib/pq v1.0.0
-	github.com/mattn/go-isatty v0.0.4
+	github.com/lib/pq v1.1.1
+	github.com/lucas-clemente/quic-go v0.11.2
+	github.com/maruel/panicparse v1.2.1
+	github.com/mattn/go-isatty v0.0.7
 	github.com/minio/sha256-simd v0.0.0-20190117184323-cc1980cb0338
-	github.com/onsi/ginkgo v0.0.0-20171221013426-6c46eb8334b3 // indirect
-	github.com/onsi/gomega v0.0.0-20171227184521-ba3724c94e4d // indirect
-	github.com/oschwald/geoip2-golang v1.1.0
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
+	github.com/oschwald/geoip2-golang v1.3.0
 	github.com/oschwald/maxminddb-golang v0.0.0-20170901134056-26fe5ace1c70 // indirect
 	github.com/petermattis/goid v0.0.0-20170816195418-3db12ebb2a59 // indirect
 	github.com/pkg/errors v0.8.1
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_golang v0.9.2
+	github.com/prometheus/client_golang v0.9.4
 	github.com/rcrowley/go-metrics v0.0.0-20171128170426-e181e095bae9
 	github.com/sasha-s/go-deadlock v0.2.0
-	github.com/stretchr/testify v1.2.2 // indirect
 	github.com/syncthing/notify v0.0.0-20181107104724-4e389ea6c0d8
-	github.com/syndtr/goleveldb v0.0.0-20171214120811-34011bf325bc
+	github.com/syndtr/goleveldb v1.0.1-0.20190318030020-c3a204f8e965
 	github.com/thejerf/suture v3.0.2+incompatible
 	github.com/urfave/cli v1.20.0
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
-	golang.org/x/net v0.0.0-20181201002055-351d144fa1fc
-	golang.org/x/text v0.0.0-20171227012246-e19ae1496984
+	golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8
+	golang.org/x/net v0.0.0-20190613194153-d28f0bde5980
+	golang.org/x/sys v0.0.0-20190613124609-5ed2794edfdc // indirect
+	golang.org/x/text v0.3.2
 	golang.org/x/time v0.0.0-20170927054726-6dc17368e09b
 	gopkg.in/asn1-ber.v1 v1.0.0-20170511165959-379148ca0225 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/ldap.v2 v2.5.1
-	gopkg.in/yaml.v2 v2.0.0-20171116090243-287cf08546ab // indirect
+	gopkg.in/yaml.v2 v2.2.2 // indirect
 )

go.sum

@@ -1,110 +1,199 @@
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gui/default/assets/css/overrides.css

@@ -124,6 +124,18 @@ table.table-condensed td.no-overflow-ellipse {
     white-space: normal;
 }
 
+table.table-auto {
+	table-layout: auto;
+}
+
+table.table-auto th {
+	width: 1px;
+}
+
+table.table-auto td {
+    max-width: 0px;
+}
+
 .folder-advanced {
     padding: 1rem;
     margin-bottom: 15px;
@@ -360,3 +372,32 @@ ul.three-columns li, ul.two-columns li {
 .fancytree-ext-table {
     width: 100% !important;
 }
+
+@media (max-width: 419px) {
+    /* the selectors are build to target only the content of folder and device
+       panels as it would "destroy" e.g. out of sync or recent changes listings */
+    div[id^='device-'].panel-collapse table,
+    div[id^='folder-'].panel-collapse table,
+    div[id^='device-'].panel-collapse tbody,
+    div[id^='folder-'].panel-collapse tbody,
+    div[id^='device-'].panel-collapse tr,
+    div[id^='folder-'].panel-collapse tr {
+        display: block;
+    }
+    div[id^='device-'].panel-collapse th,
+    div[id^='folder-'].panel-collapse th,
+    div[id^='device-'].panel-collapse td,
+    div[id^='folder-'].panel-collapse td {
+        display: block;
+        max-width: 100%;
+        width: 100%;
+    }
+    
+    /* all buttons, except panel headings, get bottom margin, as they won't fit
+       beside each other anymore */
+    .btn:not(.panel-heading),
+    /* this "+"-selector is needed to override some bootstrap defaults */
+    .btn:not(.panel-heading) + .btn:not(.panel-heading) {
+        margin-bottom: 1rem;
+    }
+}

gui/default/assets/lang/lang-bg.json

@@ -171,6 +171,7 @@
     "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",
@@ -295,6 +296,7 @@
     "Syncing": "Синхронизиране",
     "Syncthing has been shut down.": "Syncthing е спрян.",
     "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 upgrading.": "Syncthing се обновява.",
     "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...",

gui/default/assets/lang/lang-ca@valencia.json

@@ -34,7 +34,7 @@
     "Auto Accept": "Auto Acceptar",
     "Automatic upgrade now offers the choice between stable releases and release candidates.": "L'actualització automàtica ara ofereix l'elecció entre les versions estables i les versions candidates.",
     "Automatic upgrades": "Actualitzacions automàtiques",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
+    "Automatic upgrades are always enabled for candidate releases.": "Les actualitzacions automàtiques sempre estàn activades per a les versions candidates.",
     "Automatically create or share folders that this device advertises at the default path.": "Crear o compartir automàticament les carpetes que aquest dispositiu anuncia en la ruta per defecte.",
     "Available debug logging facilities:": "Hi han disponibles les següents utilitats per a depurar el registre:",
     "Be careful!": "Tin precaució!",
@@ -56,13 +56,13 @@
     "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 the following Contributors:",
+    "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}}.",
     "Danger!": "Perill!",
     "Debugging Facilities": "Utilitats de Depuració",
     "Default Folder Path": "Carpeta de la Ruta per Defecte",
     "Deleted": "Esborrat",
-    "Deselect All": "Deselect All",
+    "Deselect All": "Anul·lar tota la selecció",
     "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",
@@ -75,7 +75,7 @@
     "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:",
-    "Discard": "Discard",
+    "Discard": "Descartar",
     "Disconnected": "Desconnectat",
     "Discovered": "Descobert",
     "Discovery": "Descobriment",
@@ -98,7 +98,7 @@
     "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.": "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.",
+    "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.",
     "Error": "Error",
     "External File Versioning": "Versionat extern de fitxers",
@@ -144,9 +144,9 @@
     "Ignore": "Ignorar",
     "Ignore Patterns": "Patrons a ignorar",
     "Ignore Permissions": "Permisos a ignorar",
-    "Ignored Devices": "Ignored Devices",
-    "Ignored Folders": "Ignored Folders",
-    "Ignored at": "Ignored at",
+    "Ignored Devices": "Dispositius Ignorats",
+    "Ignored Folders": "Carpetes Ignorades",
+    "Ignored at": "Ignorat en",
     "Incoming Rate Limit (KiB/s)": "Límit de descàrrega (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "La configuración incorrecta pot danyar el contingut de la teua carpeta i deixar Syncthing inoperatiu.",
     "Introduced By": "Introduït Per",
@@ -160,17 +160,18 @@
     "Later": "Més tard",
     "Latest Change": "Últim Canvi",
     "Learn more": "Saber més",
-    "Limit": "Limit",
+    "Limit": "Límit",
     "Listeners": "Escoltants",
     "Loading data...": "Carregant dades...",
     "Loading...": "Carregant...",
     "Local Discovery": "Descobriment local",
     "Local State": "Estat local",
     "Local State (Total)": "Estat Local (Total)",
-    "Locally Changed Items": "Locally Changed Items",
+    "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",
@@ -209,7 +210,7 @@
     "Pause": "Pausa",
     "Pause All": "Pausa Tot",
     "Paused": "Pausat",
-    "Pending changes": "Pending changes",
+    "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:",
@@ -224,7 +225,7 @@
     "Quick guide to supported patterns": "Guía ràpida de patrons suportats",
     "RAM Utilization": "Utilització de la RAM",
     "Random": "Aleatori",
-    "Receive Only": "Només recivir",
+    "Receive Only": "Només rebre",
     "Recent Changes": "Canvis Recents",
     "Reduced by ignore patterns": "Reduït ignorant patrons",
     "Release Notes": "Notes de la versió",
@@ -253,7 +254,7 @@
     "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": "Select All",
+    "Select All": "Sel·leccionar Tot",
     "Select a version": "Seleccionar una versió",
     "Select latest version": "Seleccionar l'última versió",
     "Select oldest version": "Seleccionar la versió més antiga",
@@ -290,17 +291,18 @@
     "Statistics": "Estadístiques",
     "Stopped": "Parat",
     "Support": "Suport",
-    "Support Bundle": "Support Bundle",
+    "Support Bundle": "Lot de Suport",
     "Sync Protocol Listen Addresses": "Direccions d'escolta del protocol de sincronització",
     "Syncing": "Sincronitzant",
     "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 restarting.": "Syncthing està reiniciant.",
     "Syncthing is upgrading.": "Syncthing està actualitzant-se.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing pareix apagat o hi ha un problema amb la connexió a Internet. Tornant a intentar...",
     "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": "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.",
+    "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 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 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.",
@@ -314,7 +316,7 @@
     "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.": "The following items were changed locally.",
+    "The following items were changed locally.": "Els següents ítems es canviaren localment.",
     "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).",
@@ -337,7 +339,7 @@
     "Unavailable": "No disponible",
     "Unavailable/Disabled by administrator or maintainer": "No disponible/Desactivar per l'administrador o mantenedor",
     "Undecided (will prompt)": "No decidit (es preguntarà)",
-    "Unignore": "Unignore",
+    "Unignore": "Designorar",
     "Unknown": "Desconegut",
     "Unshared": "No compartit",
     "Unused": "No utilitzat",
@@ -350,14 +352,14 @@
     "Uptime": "Temps de funcionament",
     "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.": "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.",
+    "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.",
     "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 scan": "Waiting to scan",
+    "Waiting to scan": "Esperant per a escanetjar",
     "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}}\".",
@@ -365,16 +367,16 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "AVÍS: Si estàs utilitzant un observador extern com {{syncthingInotify}}, deus assegurar-te de que està desactivat.",
     "Watch for Changes": "Vigilar els Canvis",
     "Watching for Changes": "Vigilant els Canvis",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
+    "Watching for changes discovers most changes without periodic scanning.": "Vigil·lar els canvis detecta més canvis sense escanetjar periòdicament.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "Quant s'afig un nou dispositiu, hi ha que tindre en compte que aquest dispositiu deu ser afegit també en l'altre costat.",
     "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.": "Quant s'afig una nova carpeta, hi ha que tindre en compte que l'ID de la carpeta s'utilitza per a juntar les carpetes entre dispositius. Són sensibles a les majúscules i deuen coincidir exactament entre tots els dispositius.",
     "Yes": "Sí",
     "You can also select one of these nearby devices:": "Pots seleccionar també un d'aquestos dispositius propers:",
     "You can change your choice at any time in the Settings dialog.": "Pots canviar la teua elecció en qualsevol moment en el dialog Ajustos",
     "You can read more about the two release channels at the link below.": "Pots llegir més sobre els dos canals de versions en l'enllaç de baix.",
-    "You have no ignored devices.": "You have no ignored devices.",
-    "You have no ignored folders.": "You have no ignored folders.",
-    "You have unsaved changes. Do you really want to discard them?": "You have unsaved changes. Do you really want to discard them?",
+    "You have no ignored devices.": "No tens dispositius ignorats.",
+    "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.",
     "days": "dies",
     "directories": "directoris",

gui/default/assets/lang/lang-cs.json

@@ -56,7 +56,7 @@
     "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 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 následující přispěvatelé:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Vytváření ignorovaných vzorů, přepisování existujícího souboru v {{path}}.",
     "Danger!": "Pozor!",
     "Debugging Facilities": "Nástroje pro ladění",
@@ -171,6 +171,7 @@
     "Log": "Log",
     "Log tailing paused. Click here to continue.": "Log pozastaven. Klikněte zde pro pokračování.",
     "Log tailing paused. Scroll to bottom continue.": "Log pozastaven. Sjeďte dolů pro pokračování.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Sledování logu pozastaveno. Sjeďte dolů pro pokračování.",
     "Logs": "Logy",
     "Major Upgrade": "Důležitá aktualizace",
     "Mass actions": "Hromadné akce",
@@ -295,6 +296,7 @@
     "Syncing": "Synchronizuje se",
     "Syncthing has been shut down.": "Syncthing byl vypnut.",
     "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 restarting.": "Syncthing se restartuje.",
     "Syncthing is upgrading.": "Syncthing se aktualizuje.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing se zdá být nefunkční, nebo je problém s připojením k Internetu. Opakuji...",

gui/default/assets/lang/lang-da.json

@@ -171,6 +171,7 @@
     "Log": "Logbog",
     "Log tailing paused. Click here to continue.": "Logfølgning på pause. Klik her for at fortsætte.",
     "Log tailing paused. Scroll to bottom continue.": "Logfølgning på pause. Rul til bunden for at fortsætte.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Logbog",
     "Major Upgrade": "Opgradering til ny hovedversion",
     "Mass actions": "Massehandlinger",
@@ -295,6 +296,7 @@
     "Syncing": "Synkroniserer",
     "Syncthing has been shut down.": "Syncthing er lukket ned.",
     "Syncthing includes the following software or portions thereof:": "Syncthing indeholder følgende software eller dele heraf:",
+    "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 genstarter.",
     "Syncthing is upgrading.": "Syncthing opgraderer.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing ser ud til at være stoppet eller oplever problemer med din internetforbindelse. Prøver igen…",

gui/default/assets/lang/lang-de.json

@@ -34,7 +34,7 @@
     "Auto Accept": "Automatische Annahme",
     "Automatic upgrade now offers the choice between stable releases and release candidates.": "Die automatische Aktualisierung bietet jetzt die Wahl zwischen stabilen Veröffentlichungen und Veröffentlichungskandidaten.",
     "Automatic upgrades": "Automatische Aktualisierungen aktivieren",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
+    "Automatic upgrades are always enabled for candidate releases.": "Automatische Upgrades sind für Veröffentlichungskandidaten immer aktiviert.",
     "Automatically create or share folders that this device advertises at the default path.": "Automatisch Ordner erstellen oder freigeben, die dieses Gerät im Standardpfad ankündigt.",
     "Available debug logging facilities:": "Verfügbare Debugging-Möglichkeiten:",
     "Be careful!": "Vorsicht!",
@@ -56,7 +56,7 @@
     "Copied from original": "Vom Original kopiert",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 der folgenden Unterstützer:",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 der folgenden Unterstützer:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 folgende Mitwirkende:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Erstelle Ignoriermuster, welche die existierende Datei {{path}} überschreiben.",
     "Danger!": "Achtung!",
     "Debugging Facilities": "Debugging-Möglichkeiten",
@@ -171,6 +171,7 @@
     "Log": "Protokoll",
     "Log tailing paused. Click here to continue.": "Protokollaufzeichnungen sind pausiert. Klicken Sie hier um fortzufahren.",
     "Log tailing paused. Scroll to bottom continue.": "Protokollierung pausiert. Scrolle nach unten um fortzufahren.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Protokolländerungsverfolgung angehalten. Zum Ende blättern, um fortzufahren.",
     "Logs": "Protokolle",
     "Major Upgrade": "Hauptversionsaktualisierung",
     "Mass actions": "Massenaktionen",
@@ -295,6 +296,7 @@
     "Syncing": "Synchronisiere",
     "Syncthing has been shut down.": "Syncthing wurde heruntergefahren.",
     "Syncthing includes the following software or portions thereof:": "Syncthing enthält die folgende Software oder Teile von:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing ist freie und quelloffene Software, lizenziert als MPL v2.0.",
     "Syncthing is restarting.": "Syncthing wird neu gestartet",
     "Syncthing is upgrading.": "Syncthing wird aktualisiert",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing scheint nicht erreichbar zu sein oder es gibt ein Problem mit Deiner Internetverbindung. Versuche erneut...",
@@ -350,9 +352,9 @@
     "Uptime": "Betriebszeit",
     "Usage reporting is always enabled for candidate releases.": "Nutzungsbericht ist für Veröffentlichungskandidaten immer aktiviert.",
     "Use HTTPS for GUI": "HTTPS für Benutzeroberfläche verwenden",
-    "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.",
+    "Use notifications from the filesystem to detect changed items.": "Benachrichtigungen des Dateisystems nutzen, um Änderungen zu erkennen.",
+    "Variable Size Blocks": "Blöcke mit variabler Größe",
+    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Blöcke mit variabler Größe (auch „große Blöcke“) sind für große Dateien effizienter.",
     "Version": "Version",
     "Versions": "Versionen",
     "Versions Path": "Versionierungspfad",
@@ -365,7 +367,7 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Achtung: Wenn Sie einen externen Beobachter wie {{syncthingInotify}} benutzen, sollten sie sicher sein das dieser deaktiviert ist.",
     "Watch for Changes": "Auf Änderungen achten",
     "Watching for Changes": "Auf Änderungen achten",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
+    "Watching for changes discovers most changes without periodic scanning.": "Das Überwachen von Änderungen entdeckt die meisten Änderungen ohne regelmäßiges Scannen.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "Beachte beim Hinzufügen eines neuen Gerätes, dass dieses Gerät auch auf den anderen Geräten hinzugefügt werden muss.",
     "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.": "Beachte bitte beim Hinzufügen eines neuen Ordners, dass die Ordnerkennung dazu verwendet wird, Ordner zwischen Geräten zu verbinden. Die Kennung muss also auf allen Geräten gleich sein, die Groß- und Kleinschreibung muss dabei beachtet werden.",
     "Yes": "Ja",

gui/default/assets/lang/lang-el.json

@@ -171,6 +171,7 @@
     "Log": "Αρχείο καταγραφής",
     "Log tailing paused. Click here to continue.": "Η αυτόματη κύλιση έχει διακοπεί. Πατήστε εδώ για να συνεχιστεί.",
     "Log tailing paused. Scroll to bottom continue.": "Η αυτόματη ακολούθηση του αρχείου καταγραφής είναι σε παύση. Κυλίστε στο τέλος της οθόνης για να συνεχίσετε.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Αρχεία καταγραφής",
     "Major Upgrade": "Σημαντική αναβάθμιση",
     "Mass actions": "Μαζικές ενέργειες",
@@ -295,6 +296,7 @@
     "Syncing": "Συγχρονίζω",
     "Syncthing has been shut down.": "Το Syncthing έχει απενεργοποιηθεί.",
     "Syncthing includes the following software or portions thereof:": "Το Syncthing περιλαμβάνει τα παρακάτω λογισμικά ή μέρη αυτών:",
+    "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.": "Το Syncthing επανεκκινείται.",
     "Syncthing is upgrading.": "Το Syncthing αναβαθμίζεται.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Το Syncthing φαίνεται πως είναι απενεργοποιημένο ή υπάρχει πρόβλημα στη σύνδεσή σου στο διαδίκτυο. Προσπαθώ πάλι…",

gui/default/assets/lang/lang-en-GB.json

@@ -171,6 +171,7 @@
     "Log": "Log",
     "Log tailing paused. Click here to continue.": "Log tailing paused. Click here to continue.",
     "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": "Logs",
     "Major Upgrade": "Major Upgrade",
     "Mass actions": "Mass actions",
@@ -295,6 +296,7 @@
     "Syncing": "Syncing",
     "Syncthing has been shut down.": "Syncthing has been shut down.",
     "Syncthing includes the following software or portions thereof:": "Syncthing includes the following software or portions thereof:",
+    "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 is restarting.",
     "Syncthing is upgrading.": "Syncthing is upgrading.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…",

gui/default/assets/lang/lang-en.json

@@ -32,6 +32,7 @@
    "Are you sure you want to remove folder {%label%}?": "Are you sure you want to remove folder {{label}}?",
    "Are you sure you want to restore {%count%} files?": "Are you sure you want to restore {{count}} files?",
    "Auto Accept": "Auto Accept",
+   "Automatic Crash Reporting": "Automatic Crash Reporting",
    "Automatic upgrade now offers the choice between stable releases and release candidates.": "Automatic upgrade now offers the choice between stable releases and release candidates.",
    "Automatic upgrades": "Automatic upgrades",
    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
@@ -71,6 +72,7 @@
    "Device rate limits": "Device rate limits",
    "Device that last modified the item": "Device that last modified the item",
    "Devices": "Devices",
+   "Disable Crash Reporting": "Disable Crash Reporting",
    "Disabled": "Disabled",
    "Disabled periodic scanning and disabled watching for changes": "Disabled periodic scanning and disabled watching for changes",
    "Disabled periodic scanning and enabled watching for changes": "Disabled periodic scanning and enabled watching for changes",
@@ -92,6 +94,7 @@
    "Edit Folder": "Edit Folder",
    "Editing": "Editing",
    "Editing {%path%}.": "Editing {{path}}.",
+   "Enable Crash Reporting": "Enable Crash Reporting",
    "Enable NAT traversal": "Enable NAT traversal",
    "Enable Relaying": "Enable Relaying",
    "Enabled": "Enabled",
@@ -141,6 +144,7 @@
    "Global State": "Global State",
    "Help": "Help",
    "Home page": "Home page",
+   "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": "Ignore",
    "Ignore Patterns": "Ignore Patterns",
    "Ignore Permissions": "Ignore Permissions",
@@ -171,6 +175,7 @@
    "Log": "Log",
    "Log tailing paused. Click here to continue.": "Log tailing paused. Click here to continue.",
    "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": "Logs",
    "Major Upgrade": "Major Upgrade",
    "Mass actions": "Mass actions",
@@ -298,6 +303,7 @@
    "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 is restarting.",
    "Syncthing is upgrading.": "Syncthing is upgrading.",
+   "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…": "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…",
    "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.",
    "Take me back": "Take me back",

gui/default/assets/lang/lang-eo.json

@@ -171,6 +171,7 @@
     "Log": "Protokolo",
     "Log tailing paused. Click here to continue.": "Vostado de protokolo paŭzis. Alklaku ĉi tie por daŭrigi.",
     "Log tailing paused. Scroll to bottom continue.": "Vostado de protokolo paŭzis. Rulumu malsupre por daŭrigi.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Protokoloj",
     "Major Upgrade": "Ĉefa Ĝisdatigo",
     "Mass actions": "Amasa agoj",
@@ -295,6 +296,7 @@
     "Syncing": "Sinkronigas",
     "Syncthing has been shut down.": "Syncthing estis malŝaltita.",
     "Syncthing includes the following software or portions thereof:": "Syncthing inkluzivas la jenajn programarojn aŭ porciojn ĝiajn:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing estas libera kaj malferma fonta programaro licencita kiel MPL v2.0.",
     "Syncthing is restarting.": "Syncthing estas restartanta.",
     "Syncthing is upgrading.": "Syncthing estas ĝisdatigita.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing ŝajnas nefunkcii, aŭ estas problemo kun via retkonekto. Reprovado...",

gui/default/assets/lang/lang-es-ES.json

@@ -34,7 +34,7 @@
     "Auto Accept": "Auto aceptar",
     "Automatic upgrade now offers the choice between stable releases and release candidates.": "Ahora la actualización automática permite elegir entre versiones estables o versiones candidatas.",
     "Automatic upgrades": "Actualizaciones automáticas",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
+    "Automatic upgrades are always enabled for candidate releases.": "Las actualizaciones automáticas siempre están activadas para las versiones candidatas.",
     "Automatically create or share folders that this device advertises at the default path.": "Crear o compartir automáticamente las carpetas que este dispositivo anuncia en la ruta por defecto.",
     "Available debug logging facilities:": "Ayudas disponibles para la depuración del registro:",
     "Be careful!": "¡Ten cuidado!",
@@ -56,13 +56,13 @@
     "Copied from original": "Copiado del original",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 los siguientes Colaboradores:",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 Los siguientes colaboradores:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 los siguientes Colaboradores:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Crear patrones a ignorar, sobreescribiendo un fichero existente en {{path}}.",
     "Danger!": "¡Peligro!",
     "Debugging Facilities": "Ayudas a la depuración",
     "Default Folder Path": "Ruta de la carpeta por defecto",
     "Deleted": "Eliminado",
-    "Deselect All": "Deselect All",
+    "Deselect All": "Deseleccionar Todo",
     "Device": "Dispositivo",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "El dispositivo \"{{name}}\" ({{device}} en la dirección {{address}}) quiere conectarse. Añadir nuevo dispositivo?",
     "Device ID": "ID del Dispositivo",
@@ -75,7 +75,7 @@
     "Disabled periodic scanning and disabled watching for changes": "Desactivados el escaneo periódico y la vigilancia de cambios",
     "Disabled periodic scanning and enabled watching for changes": "Desactivado el escaneo periódico y activada la vigilancia de cambios",
     "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Desactivado el escaneo periódico y falló la activación de la vigilancia de cambios, reintentando cada 1 minuto:",
-    "Discard": "Discard",
+    "Discard": "Descartar",
     "Disconnected": "Desconectado",
     "Discovered": "Descubierto",
     "Discovery": "Descubrimiento",
@@ -98,7 +98,7 @@
     "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Introduce un número no negativo (por ejemplo, \"2.35\") y selecciona una unidad. Los porcentajes son como parte del tamaño total del disco.",
     "Enter a non-privileged port number (1024 - 65535).": "Introduce un puerto sin privilegios (1024 - 65535).",
     "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Introduzca las direcciones, separadas por comas (\"tcp://ip:port\", \"tcp://host:port\"), o \"dynamic\" para llevar a cabo el descubrimiento automático de la dirección.",
-    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.",
+    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Introducir direcciones separadas por coma (\"tcp://ip:port\", \"tcp://host:port\") o dinámicas para realizar el descubrimiento automático de la dirección.",
     "Enter ignore patterns, one per line.": "Introducir patrones a ignorar, uno por línea.",
     "Error": "Error",
     "External File Versioning": "Versionado externo de fichero",
@@ -144,9 +144,9 @@
     "Ignore": "Ignorar",
     "Ignore Patterns": "Patrones a ignorar",
     "Ignore Permissions": "Permisos a ignorar",
-    "Ignored Devices": "Ignored Devices",
-    "Ignored Folders": "Ignored Folders",
-    "Ignored at": "Ignored at",
+    "Ignored Devices": "Dispositivos Ignorados",
+    "Ignored Folders": "Carpetas Ignoradas",
+    "Ignored at": "Ignorado En",
     "Incoming Rate Limit (KiB/s)": "Límite de descarga (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Una configuración incorrecta puede dañar los contenidos de la carpeta y hacer  que Syncthing no funcione.",
     "Introduced By": "Introducido por",
@@ -160,17 +160,18 @@
     "Later": "Más tarde",
     "Latest Change": "Último Cambio",
     "Learn more": "Saber más",
-    "Limit": "Limit",
+    "Limit": "Límite",
     "Listeners": "Oyentes",
     "Loading data...": "Cargando datos...",
     "Loading...": "Cargando...",
     "Local Discovery": "Descubrimiento local",
     "Local State": "Estado local",
     "Local State (Total)": "Estado Local (Total)",
-    "Locally Changed Items": "Locally Changed Items",
+    "Locally Changed Items": "Ítems Cambiados Localmente",
     "Log": "Registro",
     "Log tailing paused. Click here to continue.": "Pausada la continuación del registro. Pulsar aquí para continuar.",
     "Log tailing paused. Scroll to bottom continue.": "Pausada la continuación del registro. Continúa hasta el final.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Pausada la inscripción en el Registro. Desplázate hasta el final para continuar.",
     "Logs": "Registros",
     "Major Upgrade": "Actualización importante",
     "Mass actions": "Acciones en masa",
@@ -209,7 +210,7 @@
     "Pause": "Pausar",
     "Pause All": "Pausar todo",
     "Paused": "Pausado",
-    "Pending changes": "Pending changes",
+    "Pending changes": "Cambios pendientes",
     "Periodic scanning at given interval and disabled watching for changes": "Escaneo periódico en un intervalo determinado y desactivada la vigilancia de cambios",
     "Periodic scanning at given interval and enabled watching for changes": "Escaneo periódico en un intervalo determinado y activada la vigilancia de cambios",
     "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Escaneo periódico en un intervalo determinado y falló la configuración de la vigilancia de cambios, se reintentará cada 1 minuto:",
@@ -253,7 +254,7 @@
     "Scanning": "Analizando",
     "See external versioner help for supported templated command line parameters.": "Consultar la ayuda externa del versionador para ver las plantillas de los parámetros de línea de comandos",
     "See external versioning help for supported templated command line parameters.": "Consultar la ayuda externa del versionado para ver las plantillas de los parámetros de línea de comandos",
-    "Select All": "Select All",
+    "Select All": "Seleccionar Todo",
     "Select a version": "Selecciona una versión",
     "Select latest version": "Selecciona la última versión",
     "Select oldest version": "Selecciona la versión más antigua",
@@ -290,17 +291,18 @@
     "Statistics": "Estadísticas",
     "Stopped": "Detenido",
     "Support": "Forum",
-    "Support Bundle": "Support Bundle",
+    "Support Bundle": "Lote de Soporte",
     "Sync Protocol Listen Addresses": "Direcciones de escucha del protocolo de sincronización",
     "Syncing": "Sincronizando",
     "Syncthing has been shut down.": "Syncthing se ha detenido.",
     "Syncthing includes the following software or portions thereof:": "Syncthing incluye el siguiente software o partes de él:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing es Software Gratuito y Open Source Software licenciado como MPL v2.0.",
     "Syncthing is restarting.": "Syncthing se está reiniciando.",
     "Syncthing is upgrading.": "Syncthing se está actualizando.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing parece no estar activo o hay un problema con tu conexión de internet. Reintentando...",
     "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing tiene problemas para procesar tu solicitud. Por favor, actualiza la página o reinicia Syncthing si el problema persiste.",
-    "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.",
+    "Take me back": "Llévame atrás",
+    "The GUI address is overridden by startup options. Changes here will not take effect while the override is in place.": "La dirección del GUI es sobreescrita por las opciones de arranque. Los cambios de aquí no tendrán efecto mientras la sobreescritura esté activa.",
     "The Syncthing admin interface is configured to allow remote access without a password.": "El panel de administración de Syncthing está configurado para permitir el acceso remoto sin contraseña.",
     "The aggregated statistics are publicly available at the URL below.": "Las estadísticas agragadas están disponibles públicamente en la URL de abajo.",
     "The configuration has been saved but not activated. Syncthing must restart to activate the new configuration.": "La configuración ha sido grabada pero no activada. Syncthing debe reiniciarse para activar la nueva configuración.",
@@ -314,7 +316,7 @@
     "The folder path cannot be blank.": "La ruta de la carpeta no puede estar en blanco.",
     "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.": "Se utilizan los siguientes intervalos: para la primera hora se mantiene una versión cada 30 segundos, para el primer día se mantiene una versión cada hora, para los primeros 30 días se mantiene una versión diaria hasta la edad máxima de una semana.",
     "The following items could not be synchronized.": "Los siguientes elementos no pueden ser sincronizados.",
-    "The following items were changed locally.": "The following items were changed locally.",
+    "The following items were changed locally.": "Los siguientes ítems fueron cambiados localmente.",
     "The maximum age must be a number and cannot be blank.": "La edad máxima debe ser un número y no puede estar vacía.",
     "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "El tiempo máximo para mantener una versión en días (introducir 0 para mantener las versiones indefinidamente).",
     "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "El porcentaje de espacio libre mínimo debe ser un número no negativo entre 0 y 100 (ambos inclusive).",
@@ -337,7 +339,7 @@
     "Unavailable": "No disponible",
     "Unavailable/Disabled by administrator or maintainer": "No disponible/Desactivado por el administrador o el mantenedor",
     "Undecided (will prompt)": "Aún no decidido (se preguntará al usuario)",
-    "Unignore": "Unignore",
+    "Unignore": "Designorar",
     "Unknown": "Desconocido",
     "Unshared": "No compartido",
     "Unused": "No usado",
@@ -350,14 +352,14 @@
     "Uptime": "Tiempo de funcionamiento",
     "Usage reporting is always enabled for candidate releases.": "El informe de uso está siempre habilitado en las versiones candidatas.",
     "Use HTTPS for GUI": "Usar HTTPS para la Interfaz Gráfica de Usuario (GUI)",
-    "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.",
+    "Use notifications from the filesystem to detect changed items.": "Usar notificaciones del sistema de ficheros para detectar los ítems cambiados.",
+    "Variable Size Blocks": "Bloques de Tamaño Variable",
+    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Los bloques de tamaño variable (también conocidos como \"bloques grandes\") son más eficientes para ficheros grandes.",
     "Version": "Versión",
     "Versions": "Versiones",
     "Versions Path": "Ruta de las versiones",
     "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Las versiones se borran automáticamente si son más antiguas que la edad máxima o exceden el número de ficheros permitidos en un intervalo.",
-    "Waiting to scan": "Waiting to scan",
+    "Waiting to scan": "Esperando para escanear",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "¡Peligro! Esta ruta es un directorio principal de la carpeta ya existente \"{{otherFolder}}\".",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "'Peligro! Esta ruta es un subdirectorio de la carpeta ya existente \"{{otherFolderLabel}}\"  ({{otherFolder}}).",
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Peligro! Esta ruta es un subdirectorio de una carpeta ya existente llamada \"{{otherFolder}}\".",
@@ -365,16 +367,16 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Advertencia: Si estás usando un vigilante externo como {{syncthingInotify}}, deberías asegurarte de que está desactivado.",
     "Watch for Changes": "Vigilar los cambios",
     "Watching for Changes": "Vigilando los cambios",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
+    "Watching for changes discovers most changes without periodic scanning.": "Vigilar los cambios descubre la mayoría de cambios sin escaneo periódico.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "Cuando añada un nuevo dispositivo, tenga en cuenta que este debe añadirse también en el otro lado.",
     "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.": "Cuando añada una nueva carpeta, tenga en cuenta que su ID se usa para unir carpetas entre dispositivos. Son sensibles a las mayúsculas y deben coincidir exactamente entre todos los dispositivos.",
     "Yes": "Si",
     "You can also select one of these nearby devices:": "Puedes seleccionar también uno de estos dispositivos cercanos:",
     "You can change your choice at any time in the Settings dialog.": "Puedes cambiar tu elección en cualquier momento en el panel de Ajustes.",
     "You can read more about the two release channels at the link below.": "Puedes leer más sobre los dos método de publicación de versiones en el siguiente enlace.",
-    "You have no ignored devices.": "You have no ignored devices.",
-    "You have no ignored folders.": "You have no ignored folders.",
-    "You have unsaved changes. Do you really want to discard them?": "You have unsaved changes. Do you really want to discard them?",
+    "You have no ignored devices.": "No tienes dispositivos ignorados.",
+    "You have no ignored folders.": "No tienes carpetas ignoradas.",
+    "You have unsaved changes. Do you really want to discard them?": "Tienes cambios sin guardar. ¿Quieres descartarlos?",
     "You must keep at least one version.": "Debes mantener al menos una versión.",
     "days": "días",
     "directories": "directorios",

gui/default/assets/lang/lang-es.json

@@ -171,6 +171,7 @@
     "Log": "Registro",
     "Log tailing paused. Click here to continue.": "Seguimiento del registro pausado. Haga clic aquí para continuar.",
     "Log tailing paused. Scroll to bottom continue.": "Registro de cola en pausa. Mueve el cursor hasta la parte inferior para continuar.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Registros",
     "Major Upgrade": "Actualización importante",
     "Mass actions": "Acción masiva",
@@ -295,6 +296,7 @@
     "Syncing": "Sincronizando",
     "Syncthing has been shut down.": "Syncthing se ha detenido.",
     "Syncthing includes the following software or portions thereof:": "Syncthing incluye el siguiente software o partes de él:",
+    "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 se está reiniciando.",
     "Syncthing is upgrading.": "Syncthing se está actualizando.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing parece no estar activo o hay un problema con tu conexión de internet. Reintentando...",

gui/default/assets/lang/lang-fi.json

@@ -171,6 +171,7 @@
     "Log": "Loki",
     "Log tailing paused. Click here to continue.": "Login seuraaminen pysäytetty. Jatka klikkaamalla tästä.",
     "Log tailing paused. Scroll to bottom continue.": "Login seuraaminen pysäytetty. Jatka vierittämällä alas.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Lokit",
     "Major Upgrade": "Pääversion päivitys.",
     "Mass actions": "Massamuutokset",
@@ -295,6 +296,7 @@
     "Syncing": "Synkronoidaan",
     "Syncthing has been shut down.": "Syncthing on sammutettu.",
     "Syncthing includes the following software or portions thereof:": "Syncthing sisältää seuraavat ohjelmistot tai sen osat:",
+    "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 käynnistyy uudelleen.",
     "Syncthing is upgrading.": "Syncthing päivittyy.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing näyttää olevan alhaalla tai internetyhteydessä on ongelma. Yritetään uudelleen...",

gui/default/assets/lang/lang-fr.json

@@ -171,6 +171,7 @@
     "Log": "Journal",
     "Log tailing paused. Click here to continue.": "La file d'attente du journal est en pause. Cliquer ici pour continuer.",
     "Log tailing paused. Scroll to bottom continue.": "Le défilement du journal est en pause. Faites défiler vers le bas pour continuer.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Le défilement du journal est en pause. Faites défiler jusqu'en bas pour continuer.",
     "Logs": "Journaux",
     "Major Upgrade": "Mise à jour majeure",
     "Mass actions": "Actions multiples",
@@ -295,6 +296,7 @@
     "Syncing": "Synchronisation en cours",
     "Syncthing has been shut down.": "Syncthing a été arrêté.",
     "Syncthing includes the following software or portions thereof:": "Syncthing intègre les logiciels suivants (ou des éléments provenant de ces logiciels) :",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing est un logiciel Libre et Open Source sous licence MPL v2.0.",
     "Syncthing is restarting.": "Syncthing redémarre.",
     "Syncthing is upgrading.": "Syncthing se met à jour.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing semble être arrêté, ou il y a un problème avec votre connexion Internet. Nouvelle tentative ...",

gui/default/assets/lang/lang-fy.json

@@ -34,7 +34,7 @@
     "Auto Accept": "Auto-akseptaasje",
     "Automatic upgrade now offers the choice between stable releases and release candidates.": "Automatyske fernijing biedt no de kar tusken stabyle ferzjes en ferzje kandidaten",
     "Automatic upgrades": "Automatyske fernijings",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
+    "Automatic upgrades are always enabled for candidate releases.": "Automatyske opwurdearrings stean altyd oan foar kandidaat-ferzjes.",
     "Automatically create or share folders that this device advertises at the default path.": "Meitsje of diel automatysk mappen dy't dit apparaat advertearret op it standert paad.",
     "Available debug logging facilities:": "Beskikbere debug-lochfoarsjennings:",
     "Be careful!": "Tink derom!",
@@ -56,7 +56,7 @@
     "Copied from original": "Oernommen fan orizjineel",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 de folgende bydragers:",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 de folgende Bydragers:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 de folgende Bydragers:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Meitsje negear-patroanen dy in besteande triem oerskriuwe yn {{path}}.",
     "Danger!": "Gefaar!",
     "Debugging Facilities": "Debug-foarsjennings",
@@ -98,7 +98,7 @@
     "Enter a non-negative number (e.g., \"2.35\") and select a unit. Percentages are as part of the total disk size.": "Fier in net-negatyf nûmer yn (bygelyks \"2.35\") en selektearje in ienheid. Percentages stean foar it part fan de totale skiifromte.",
     "Enter a non-privileged port number (1024 - 65535).": "Fier in net-befoarrjochte poart-nûmer yn (1024 - 65535).",
     "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Fier troch komma's skieden (\"tcp://ip:port\", \"tcp://host:port\") adressen yn of \"dynamic\" om automatyske ûntdekking fan it adres út te fieren.",
-    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.",
+    "Enter comma separated (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Fier troch komma's skieden (\"tcp://ip:port\", \"tcp://host:port\") adressen yn of \"dynamic\" om automatyske ûntdekking fan it adres út te fieren.",
     "Enter ignore patterns, one per line.": "Fier negearpatroanen yn, ien per rigel.",
     "Error": "Flater",
     "External File Versioning": "Ekstern ferzjebehear foar triemen",
@@ -160,17 +160,18 @@
     "Later": "Letter",
     "Latest Change": "Meast Resinte Feroarings",
     "Learn more": "Mear witte",
-    "Limit": "Limit",
+    "Limit": "Limyt",
     "Listeners": "Harkers",
     "Loading data...": "Data oan it laden...",
     "Loading...": "Oan it laden...",
     "Local Discovery": "Lokale ûntdekking",
     "Local State": "Lokale tastân",
     "Local State (Total)": "Lokale tastân (Folledich)",
-    "Locally Changed Items": "Locally Changed Items",
+    "Locally Changed Items": "Lokaal Feroare Items",
     "Log": "Loch",
     "Log tailing paused. Click here to continue.": "Loch-sturt skofte. Klik hjir om fjirder te gean.",
     "Log tailing paused. Scroll to bottom continue.": "Loch-sturt skofte. Rolje helendal nei ûnder om fjirder te gean.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Lochs",
     "Major Upgrade": "Wichtige fernijing",
     "Mass actions": "Massa-aksjes",
@@ -295,6 +296,7 @@
     "Syncing": "Oan it Syncen",
     "Syncthing has been shut down.": "Syncthing is útsetten",
     "Syncthing includes the following software or portions thereof:": "Syncthing befettet de folgende sêftguod of parten dêrfan:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing is Fergees en Iepenboarne Programmatuer mei in MPL V2.0 lisinsje.",
     "Syncthing is restarting.": "Syncthing oan it werstarten.",
     "Syncthing is upgrading.": "Syncthing is oan it fernijen.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "It liket dêrop dat Syncthing op dit stuit net rint, of der is in swierrichheid mei jo ynternetferbining. Wurd no opnij besocht...",
@@ -314,7 +316,7 @@
     "The folder path cannot be blank.": "It map-paad mei net leech wêze.",
     "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.": "De folgende yntervals wurd brûkt: foar it earste oere wurd eltse 30 sekonden in ferzje bewarre, foar de earste dei wurd eltse oere in ferzje bewarre, foar de earste 30 dagen wurd eltse dei in ferzje bewarre, oant ta de maksimale âldens wurd eltse wike in ferzje bewarre.",
     "The following items could not be synchronized.": "De folgende items koene net syngronisearre wurde.",
-    "The following items were changed locally.": "The following items were changed locally.",
+    "The following items were changed locally.": "De neikommende items binne lokaal feroare.",
     "The maximum age must be a number and cannot be blank.": "De maksimale âldens moat in nûmer en net leech wêze.",
     "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "De maksimale tiid dat in ferzje bewarre wurde moat (yn dagen, stel yn op 0 om ferzjes foar immer te bewarjen).",
     "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "It maksimale persintaazje frije skiifromte moat in posityf nûmer wêze tusken 0 en 100 (ynklusyf).",
@@ -350,14 +352,14 @@
     "Uptime": "Rintiid",
     "Usage reporting is always enabled for candidate releases.": "Brûkersrapportaazje stiet altyd oan foar ferzje kandidaten.",
     "Use HTTPS for GUI": "Brûk HTTPS foar GUI",
-    "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.",
+    "Use notifications from the filesystem to detect changed items.": "Brûk notifikaasjes fan it triemsysteem om feroare items te detektearjen.",
+    "Variable Size Blocks": "Fariabele Blokgrutte",
+    "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Fariabele blokgrutte (ek wol \"grutte blokken\") binne effisjinter foar gruttere triemmen.",
     "Version": "Ferzje",
     "Versions": "Ferzjes",
     "Versions Path": "Ferzjes-paad",
     "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Ferzjes wurde automatysk fuortsmiten wannear't se âlder binne dan de maksimale âldens of wannear it tal fan triemen yn in ynterval grutter is dan tastean.",
-    "Waiting to scan": "Waiting to scan",
+    "Waiting to scan": "Wachtet om te skennen",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Warskôging, dit paad is in boppelizzende triemtafel fan in besteande map \"{{otherFolder}}\".",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Warskôging, dit paad is in boppelizzende triemtafel fan in besteande map \"{{otherFolderLabel}}\" ({{otherFolder}}).",
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Warskôging, dit paad is in ûnderlizzende triemtafel fan in besteande map \"{{otherFolder}}\".",
@@ -365,7 +367,7 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Warskôging: As jo in eksterne sjogger lykas {{syncthingInotify}} brûke, bin der dan wiis fan dat dizze út stiet.",
     "Watch for Changes": "Sjoch foar Feroarings",
     "Watching for Changes": "Sjocht foar Feroarings",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
+    "Watching for changes discovers most changes without periodic scanning.": "Sjen foar feroarings  ûntdekt de measte feroarings sûnder periodyk skennen.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "Hâld by it taheakjen fan in nij apparaat yn de holle dat it apparaat oan de oare kant ek taheakke wurde moat. ",
     "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.": "Hâld by it taheakjen fan in nije map yn de holle dat de map-ID brûkt wurd om de mappen tusken apparaten mei-inoar te ferbinen. Se binne haadlettergefoelich en moatte oer alle apparaten eksakt oerienkomme.",
     "Yes": "Ja",

gui/default/assets/lang/lang-hu.json

@@ -171,6 +171,7 @@
     "Log": "Napló",
     "Log tailing paused. Click here to continue.": "Napló utolsó sorainak figyelése leállítva. Ide kattintva lehet folytatni.",
     "Log tailing paused. Scroll to bottom continue.": "Napló utolsó sorainak figyelése leállítva. Görgetve lehet folytatni.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Napló utolsó sorainak figyelése leállítva. Görgetve lehet folytatni.",
     "Logs": "Naplófájlok",
     "Major Upgrade": "Főverzió-frissítés",
     "Mass actions": "Tömeges műveletek",
@@ -295,6 +296,7 @@
     "Syncing": "Szinkronizálás",
     "Syncthing has been shut down.": "Syncthing leállítva",
     "Syncthing includes the following software or portions thereof:": "A Syncthing a következő programokat, vagy komponenseket tartalmazza.",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "A Syncthing szabad és nyílt forráskódú szoftver MPL v2.0 licenccel.",
     "Syncthing is restarting.": "Syncthing újraindul",
     "Syncthing is upgrading.": "Syncthing frissül",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Úgy tűnik, hogy a Syncthing nem működik, vagy valami probléma van a hálózati kapcsolattal. Újra próbálom...",

gui/default/assets/lang/lang-it.json

@@ -56,7 +56,7 @@
     "Copied from original": "Copiato dall'originale",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 i seguenti Collaboratori:",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 i seguenti Collaboratori:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 i seguenti Collaboratori:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Creazione di schemi di esclusione, sovrascrivendo un file esistente in {{path}}.",
     "Danger!": "Pericolo!",
     "Debugging Facilities": "Servizi di Debug",
@@ -171,6 +171,7 @@
     "Log": "Log",
     "Log tailing paused. Click here to continue.": "Visualizzazione log in pausa. Clicca qui per continuare.",
     "Log tailing paused. Scroll to bottom continue.": "Visualizzazione log in pausa. Scorri fino in fondo per continuare.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Visualizzazione log in pausa. Scorri fino in fondo per continuare.",
     "Logs": "Log",
     "Major Upgrade": "Aggiornamento Principale",
     "Mass actions": "Azioni di massa",
@@ -295,6 +296,7 @@
     "Syncing": "Sincronizzazione in corso",
     "Syncthing has been shut down.": "Syncthing è stato arrestato.",
     "Syncthing includes the following software or portions thereof:": "Syncthing utilizza i seguenti software o porzioni di questi:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing è un software Libero e Open Source concesso in licenza MPL v2.0.",
     "Syncthing is restarting.": "Riavvio di Syncthing in corso.",
     "Syncthing is upgrading.": "Aggiornamento di Syncthing in corso.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing sembra inattivo, oppure c'è un problema con la tua connessione a Internet. Nuovo tentativo…",

gui/default/assets/lang/lang-ja.json

@@ -171,6 +171,7 @@
     "Log": "ログ",
     "Log tailing paused. Click here to continue.": "Log tailing paused. Click here to continue.",
     "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": "ログ",
     "Major Upgrade": "メジャーアップグレード",
     "Mass actions": "Mass actions",
@@ -295,6 +296,7 @@
     "Syncing": "同期中",
     "Syncthing has been shut down.": "Syncthingをシャットダウンしました。",
     "Syncthing includes the following software or portions thereof:": "Syncthingは以下のソフトウェアまたはその一部を内包しています:",
+    "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を再起動しています。",
     "Syncthing is upgrading.": "Syncthingをアップグレード中です。",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthingが落ちているか、インターネット接続に問題があります。リトライ中です…",
@@ -354,7 +356,7 @@
     "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.",
     "Version": "バージョン",
-    "Versions": "Versions",
+    "Versions": "バージョン",
     "Versions Path": "古いバージョンを保存するパス",
     "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "古いバージョンは、最大保存日数もしくは期間ごとの最大保存数を超えた場合、自動的に削除されます。",
     "Waiting to scan": "Waiting to scan",
@@ -365,7 +367,7 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Warning: If you are using an external watcher like {{syncthingInotify}}, you should make sure it is deactivated.",
     "Watch for Changes": "変更の監視",
     "Watching for Changes": "変更の監視",
-    "Watching for changes discovers most changes without periodic scanning.": "Watching for changes discovers most changes without periodic scanning.",
+    "Watching for changes discovers most changes without periodic scanning.": "変更の監視は、定期スキャンを行わずにほとんどの変更を検出できます。",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "新しいデバイスを追加する際は、相手側デバイスにもこのデバイスを追加してください。",
     "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.": "新しいフォルダーを追加する際、フォルダーIDはデバイス間でフォルダーの対応づけに使われることに注意してください。フォルダーIDは大文字と小文字が区別され、共有するすべてのデバイスの間で完全に一致しなくてはなりません。",
     "Yes": "はい",

gui/default/assets/lang/lang-ko-KR.json

@@ -171,6 +171,7 @@
     "Log": "기록",
     "Log tailing paused. Click here to continue.": "기록 출력이 일시정지됨. 계속하려면 여기를 클릭하십시오. ",
     "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": "기록",
     "Major Upgrade": "메이저 업데이트",
     "Mass actions": "Mass actions",
@@ -295,6 +296,7 @@
     "Syncing": "동기화 중",
     "Syncthing has been shut down.": "Syncthing이 종료되었습니다.",
     "Syncthing includes the following software or portions thereof:": "Syncthing은 다음과 같은 소프트웨어나 그 일부를 포함합니다:",
+    "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.": "Syncthing이 재시작 중입니다.",
     "Syncthing is upgrading.": "Syncthing이 업데이트 중입니다.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing이 중지되었거나 인터넷 연결에 문제가 있는 것 같습니다. 재시도 중입니다...",

gui/default/assets/lang/lang-lt.json

@@ -171,6 +171,7 @@
     "Log": "Žurnalas",
     "Log tailing paused. Click here to continue.": "Žurnalo galas pristabdytas. Spustelėkite čia, norėdami tęsti.",
     "Log tailing paused. Scroll to bottom continue.": "Žurnalo galas pristabdytas. Slinkite į apačią, norėdami tęsti.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Žurnalo galas pristabdytas. Slinkite į apačią, norėdami tęsti.",
     "Logs": "Žurnalai",
     "Major Upgrade": "Stambus atnaujinimas",
     "Mass actions": "Masiniai veiksmai",
@@ -295,6 +296,7 @@
     "Syncing": "Sutapatinama",
     "Syncthing has been shut down.": "Syncthing išjungtas",
     "Syncthing includes the following software or portions thereof:": "Syncthing naudoja šias programas ar jų dalis:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing yra laisva ir atvirojo kodo programinė įranga, licencijuota pagal MPL v2.0.",
     "Syncthing is restarting.": "Syncthing perleidžiamas",
     "Syncthing is upgrading.": "Syncthing atsinaujina.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing  išjungta arba problemos su Interneto ryšių. Bandoma iš naujo...",

gui/default/assets/lang/lang-nb.json

@@ -34,7 +34,7 @@
     "Auto Accept": "Godta automatisk",
     "Automatic upgrade now offers the choice between stable releases and release candidates.": "Automatisk oppgradering lar deg nå få valget mellom ferdige utgaver og utgivelseskandidater.",
     "Automatic upgrades": "Automatiske oppdateringer",
-    "Automatic upgrades are always enabled for candidate releases.": "Automatic upgrades are always enabled for candidate releases.",
+    "Automatic upgrades are always enabled for candidate releases.": "Automatisk oppgradering er alltid påslått for utgivelseskandidater.",
     "Automatically create or share folders that this device advertises at the default path.": "Opprett eller del mapper automatisk i mapper som denne enheten melder som forvalgt mappe.",
     "Available debug logging facilities:": "Tilgjengelige funksjoner for logging i feilrettingsøyemed:",
     "Be careful!": "Vær forsiktig!",
@@ -56,7 +56,7 @@
     "Copied from original": "Kopiert fra original",
     "Copyright © 2014-2016 the following Contributors:": "Opphavsrett © 2014-2016 for følgende bidragsytere:",
     "Copyright © 2014-2017 the following Contributors:": "Opphavsrett © 2014-2017 for følgende bidragsytere:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Opphavrett © 2014-2019 for følgende bidragsytere:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Oppretter ignoreringsmønster, overskriver eksisterende fil i {{path}}.",
     "Danger!": "Fare!",
     "Debugging Facilities": "Feilrettingsverktøy",
@@ -75,7 +75,7 @@
     "Disabled periodic scanning and disabled watching for changes": "Skrudde av både periodisk skanning og oppsyn med endringer",
     "Disabled periodic scanning and enabled watching for changes": "Skrudde av periodisk skanning og skrudde på oppsyn med endringer",
     "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Skrudde av periodisk skanning og mislyktes i oppsett av oppsyn med endringer, prøver igjen hvert minutt:",
-    "Discard": "Discard",
+    "Discard": "Kasser",
     "Disconnected": "Frakoblet",
     "Discovered": "Oppdaget",
     "Discovery": "Oppslag",
@@ -145,7 +145,7 @@
     "Ignore Patterns": "Utelatelsesmønster",
     "Ignore Permissions": "Ignorer rettigheter",
     "Ignored Devices": "Ignored Devices",
-    "Ignored Folders": "Ignored Folders",
+    "Ignored Folders": "Utelatte mapper",
     "Ignored at": "Ignored at",
     "Incoming Rate Limit (KiB/s)": "Innkommende hastighetsbegrensning (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Feilaktige innstillinger kan skade innholdet i dine delte mapper og hindre Syncthing i å fungere.",
@@ -171,6 +171,7 @@
     "Log": "Logg",
     "Log tailing paused. Click here to continue.": "Tail-utdata pauset. Klikk her for å fortsette.",
     "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": "Logger",
     "Major Upgrade": "Storoppgradering",
     "Mass actions": "Massehandlinger",
@@ -295,6 +296,7 @@
     "Syncing": "Synkroniserer",
     "Syncthing has been shut down.": "Syncthing har blitt slått av.",
     "Syncthing includes the following software or portions thereof:": "Syncthing inkluderer helt eller delvis følgende programvare:",
+    "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 starter på ny.",
     "Syncthing is upgrading.": "Syncthing oppgraderer.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing ser ut til å være nede, eller så er det et problem med nettforbindelsen din. Prøver på ny …",
@@ -357,7 +359,7 @@
     "Versions": "Versjoner",
     "Versions Path": "Plassering av versjoner",
     "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Versjoner blir automatisk slettet når maksimal levetid er nådd eller når antall filer er oversteget.",
-    "Waiting to scan": "Waiting to scan",
+    "Waiting to scan": "Venter på å starte gjennomsøkning",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Advarsel, denne stien er en foreldremappe for en eksisterende mappe \"{{otherFolder}}\".",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Advarsel, denne stien er en foreldremappe for en eksisterende mappe \"{{otherFolderLabel}}\" ({{otherFolder}}).",
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Advarsel, denne stien er en undermappe i en eksisterende mappe \"{{otherFolder}}\".",

gui/default/assets/lang/lang-nl.json

@@ -169,8 +169,9 @@
     "Local State (Total)": "Lokale status (totaal)",
     "Locally Changed Items": "Lokaal gewijzigde items",
     "Log": "Logboek",
-    "Log tailing paused. Click here to continue.": "Loggen gepauzeerd. Klik hier om verder te gaan.",
-    "Log tailing paused. Scroll to bottom continue.": "Loggen gepauzeerd. Naar beneden scrollen om door te gaan.",
+    "Log tailing paused. Click here to continue.": "Log-tailing gepauzeerd. Klik hier om verder te gaan.",
+    "Log tailing paused. Scroll to bottom continue.": "Log-tailing gepauzeerd. Naar onderkant scrollen om door te gaan.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log-tailing gepauzeerd. Naar de onderkant scrollen om door te gaan.",
     "Logs": "Logboeken",
     "Major Upgrade": "Grote upgrade",
     "Mass actions": "Groepsacties",
@@ -295,6 +296,7 @@
     "Syncing": "Synchroniseren",
     "Syncthing has been shut down.": "Syncthing werd afgesloten.",
     "Syncthing includes the following software or portions thereof:": "Syncthing bevat de volgende software of delen daarvan:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing is gratis en opensource software onder licentie van MPL v2.0.",
     "Syncthing is restarting.": "Syncthing is aan het herstarten.",
     "Syncthing is upgrading.": "Syncthing is aan het bijwerken.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing lijkt gestopt te zijn, of er is een probleem met uw internetverbinding. Opnieuw proberen...",
@@ -372,9 +374,9 @@
     "You can also select one of these nearby devices:": "U kunt ook een van deze apparaten in de buurt selecteren:",
     "You can change your choice at any time in the Settings dialog.": "U kunt uw keuze op elk moment aanpassen in het instellingen-venster.",
     "You can read more about the two release channels at the link below.": "U kunt meer te weten komen over de twee release-kanalen via onderstaande link.",
-    "You have no ignored devices.": "U heeft geen genegeerde apparaten.",
-    "You have no ignored folders.": "U heeft geen genegeerde mappen.",
-    "You have unsaved changes. Do you really want to discard them?": "U heeft niet-opgeslagen wijzigingen. Wilt u ze echt verwerpen?",
+    "You have no ignored devices.": "U hebt geen genegeerde apparaten.",
+    "You have no ignored folders.": "U hebt geen genegeerde mappen.",
+    "You have unsaved changes. Do you really want to discard them?": "U hebt niet-opgeslagen wijzigingen. Wilt u ze echt verwerpen?",
     "You must keep at least one version.": "U moet minstens één versie bewaren.",
     "days": "dagen",
     "directories": "mappen",

gui/default/assets/lang/lang-pl.json

@@ -171,6 +171,7 @@
     "Log": "Log",
     "Log tailing paused. Click here to continue.": "Śledzenie loga wstrzymane. Kliknij tutaj aby wznowić",
     "Log tailing paused. Scroll to bottom continue.": "Zatrzymano śledzenie dziennika. Przewiń w dół, aby kontynuować.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Logi",
     "Major Upgrade": "Ważna aktualizacja",
     "Mass actions": "Działania masowe",
@@ -295,6 +296,7 @@
     "Syncing": "Synchronizowanie",
     "Syncthing has been shut down.": "Syncthing został wyłączony",
     "Syncthing includes the following software or portions thereof:": "Syncthing zawiera następujące oprogramowanie lub ich częśći:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing to wolne oprogramowanie na licencji MPL 2.0",
     "Syncthing is restarting.": "Restart Syncthing",
     "Syncthing is upgrading.": "Aktualizowanie Syncthing",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing wydaje się być wyłączony lub jest problem z twoim połączeniem internetowym. Próbuje ponownie...",
@@ -351,7 +353,7 @@
     "Usage reporting is always enabled for candidate releases.": "Raportowanie użycia dla wydań kandydujących jest zawsze włączone.",
     "Use HTTPS for GUI": "Używaj HTTPS",
     "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": "Bloki różnych wielkości",
     "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Variable size blocks (also \"large blocks\") are more efficient for large files.",
     "Version": "Wersja",
     "Versions": "Wersje",

gui/default/assets/lang/lang-pt-BR.json

@@ -171,6 +171,7 @@
     "Log": "Log",
     "Log tailing paused. Click here to continue.": "Observação do log pausada. Clique aqui para continuar.",
     "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": "Logs",
     "Major Upgrade": "Atualização \"major\"",
     "Mass actions": "Ações em massa",
@@ -295,6 +296,7 @@
     "Syncing": "Sincronizando",
     "Syncthing has been shut down.": "O Syncthing foi desligado.",
     "Syncthing includes the following software or portions thereof:": "O Syncthing inclui os seguintes programas ou partes deles:",
+    "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.": "O Syncthing está sendo reiniciado.",
     "Syncthing is upgrading.": "O Syncthing está sendo atualizado.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Parece que o Syncthing está desligado ou há um problema com a sua conexão de internet. Tentando novamente...",

gui/default/assets/lang/lang-pt-PT.json

@@ -171,6 +171,7 @@
     "Log": "Registo",
     "Log tailing paused. Click here to continue.": "O acompanhamento do final do registo está em pausa. Clique aqui para continuar.",
     "Log tailing paused. Scroll to bottom continue.": "O acompanhamento do final do registo está em pausa. Desloque para o final para continuar.",
+    "Log tailing paused. Scroll to the bottom to continue.": "O acompanhamento do final do registo está em pausa. Desloque para o final para continuar.",
     "Logs": "Registos",
     "Major Upgrade": "Actualização importante",
     "Mass actions": "Acções em massa",
@@ -295,6 +296,7 @@
     "Syncing": "A Sincronizar",
     "Syncthing has been shut down.": "O Syncthing foi desligado.",
     "Syncthing includes the following software or portions thereof:": "O Syncthing inclui as seguintes aplicações ou partes delas:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing é Software Livre e de Código Aberto licenciado como MPL v2.0.",
     "Syncthing is restarting.": "O Syncthing está a reiniciar.",
     "Syncthing is upgrading.": "O Syncthing está a actualizar-se.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "O Syncthing parece estar em baixo, ou então existe um problema com a sua ligação à Internet. Tentando novamente...",
@@ -365,7 +367,7 @@
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Aviso: Se estiver a usar um verificador externo, tal como o {{syncthingInotify}}, deve certificar-se que está desactivado.",
     "Watch for Changes": "Vigiar alterações",
     "Watching for Changes": "Vigilância de alterações",
-    "Watching for changes discovers most changes without periodic scanning.": "A vigilância de alterações encontra a maior parte das alterações sem a verificação periódica.",
+    "Watching for changes discovers most changes without periodic scanning.": "A vigilância de alterações detecta a maior parte das alterações sem a necessidade de fazer uma verificação periódica.",
     "When adding a new device, keep in mind that this device must be added on the other side too.": "Quando adicionar um novo dispositivo, lembre-se que este dispositivo tem que ser adicionado do outro lado também.",
     "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.": "Quando adicionar uma nova pasta, lembre-se que o ID da pasta é utilizado para ligar as pastas entre dispositivos. É sensível às diferenças entre maiúsculas e minúsculas e tem que ter uma correspondência perfeita entre todos os dispositivos.",
     "Yes": "Sim",

gui/default/assets/lang/lang-ru.json

@@ -171,6 +171,7 @@
     "Log": "Журнал",
     "Log tailing paused. Click here to continue.": "Вывод журнала приостановлен. Чтобы продолжить, нажмите здесь.",
     "Log tailing paused. Scroll to bottom continue.": "Вывод журнала приостановлен. Чтобы продолжить, прокрутите журнал до конца.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Вывод журнала приостановлен. Чтобы продолжить, прокрутите до журнал конца.",
     "Logs": "Журналы",
     "Major Upgrade": "Обновление основной версии",
     "Mass actions": "Массовые действия",
@@ -295,6 +296,7 @@
     "Syncing": "Синхронизация",
     "Syncthing has been shut down.": "Syncthing был выключен.",
     "Syncthing includes the following software or portions thereof:": "Syncthing включает в себя следующее ПО или его части:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing — свободное программное обеспечение с открытым кодом под лицензией MPL v2.0.",
     "Syncthing is restarting.": "Перезапуск Syncthing.",
     "Syncthing is upgrading.": "Обновление Syncthing.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Кажется, Syncthing не запущен или есть проблемы с подключением к Интернету. Переподключаюсь...",
@@ -336,7 +338,7 @@
     "Type": "Тип",
     "Unavailable": "Недоступно",
     "Unavailable/Disabled by administrator or maintainer": "Недоступно или отключено администратором",
-    "Undecided (will prompt)": "Запрос каждый раз",
+    "Undecided (will prompt)": "Не определено (запрашивать каждый раз)",
     "Unignore": "Не игнорировать",
     "Unknown": "Неизвестно",
     "Unshared": "Необщедоступно",

gui/default/assets/lang/lang-sk.json

@@ -12,7 +12,7 @@
     "Add Remote Device": "Pridať vzdialené zariadenie",
     "Add devices from the introducer to our device list, for mutually shared folders.": "Pre vzájomne zdieľané adresáre pridaj zariadenie od zavádzača do svojho zoznamu zariadení.",
     "Add new folder?": "Pridať nový adresár?",
-    "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.": "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.",
+    "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.": "Naviac interval plného skenovania bude navýšený (60krát, t.j. nová výchozia hodnota 1h). Môžete to nastaviť aj manuálne pre každý adresár ak zvolíte Nie.",
     "Address": "Adresa",
     "Addresses": "Adresy",
     "Advanced": "Pokročilé",
@@ -56,13 +56,13 @@
     "Copied from original": "Skopírované z originálu",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 následujúci prispivatelia:",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 následujúci prispivatelia:",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 nasledujúci prispievatelia:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Vytváranie vzorov ignorovania, prepísanie existujúceho súboru v {{path}}.",
     "Danger!": "Pozor!",
     "Debugging Facilities": "Debugging Facilities",
     "Default Folder Path": "Predvolená adresárová cesta",
     "Deleted": "Zmazané",
-    "Deselect All": "Deselect All",
+    "Deselect All": "Odznačiť všetko",
     "Device": "Zariadenie",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "Zariadenie \"{{name}}\" ({{device}} na {{address}}) sa chce pripojiť. Pridať nové zariadenie?",
     "Device ID": "ID zariadenia",
@@ -75,14 +75,14 @@
     "Disabled periodic scanning and disabled watching for changes": "Disabled periodic scanning and disabled watching for changes",
     "Disabled periodic scanning and enabled watching for changes": "Disabled periodic scanning and enabled watching for changes",
     "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:",
-    "Discard": "Discard",
+    "Discard": "Zahodiť",
     "Disconnected": "Odpojené",
     "Discovered": "Zistené",
     "Discovery": "Zisťovanie",
     "Discovery Failures": "Zlyhania zisťovania",
     "Do not restore": "Neobnovovať",
     "Do not restore all": "Neobnovovať všetko",
-    "Do you want to enable watching for changes for all your folders?": "Do you want to enable watching for changes for all your folders?",
+    "Do you want to enable watching for changes for all your folders?": "Chcete zapnúť sledovanie zmien vo všetkých priečinkoch?",
     "Documentation": "Dokumentácia",
     "Download Rate": "Rýchlosť sťahovania",
     "Downloaded": "Stiahnuté",
@@ -144,8 +144,8 @@
     "Ignore": "Ignorovať",
     "Ignore Patterns": "Ignorované vzory",
     "Ignore Permissions": "Ignorované práva",
-    "Ignored Devices": "Ignored Devices",
-    "Ignored Folders": "Ignored Folders",
+    "Ignored Devices": "Ignorované zariadenia",
+    "Ignored Folders": "Ingorované priečinky",
     "Ignored at": "Ignored at",
     "Incoming Rate Limit (KiB/s)": "Limit pre sťahovanie (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "Nesprávna konfigurácia môže poškodiť váš adresár a spôsobiť nefunkčnosť aplikácie Súbory.",
@@ -167,10 +167,11 @@
     "Local Discovery": "Lokálne vyhľadávanie",
     "Local State": "Lokálny status",
     "Local State (Total)": "Lokálny status (celkový)",
-    "Locally Changed Items": "Locally Changed Items",
+    "Locally Changed Items": "Lokálne zmenené položky",
     "Log": "Záznam",
     "Log tailing paused. Click here to continue.": "Posúvanie záznamu prerušené. Klikni pre pokračovanie.",
     "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": "Záznamy",
     "Major Upgrade": "Hlavná aktualizácia",
     "Mass actions": "Hromadná akcia",
@@ -209,11 +210,11 @@
     "Pause": "Pozastaviť",
     "Pause All": "Pozastaviť všetky",
     "Paused": "Pozastavené",
-    "Pending changes": "Pending changes",
-    "Periodic scanning at given interval and disabled watching for changes": "Periodic scanning at given interval and disabled watching for changes",
-    "Periodic scanning at given interval and enabled watching for changes": "Periodic scanning at given interval and enabled watching for changes",
+    "Pending changes": "Čakajúce zmeny",
+    "Periodic scanning at given interval and disabled watching for changes": "Periodické skenovanie v zvolenom rozsahu a vypnuté sledovanie zmien.",
+    "Periodic scanning at given interval and enabled watching for changes": "Periodické skenovanie v zvolenom rozsahu a zapnuté sledovanie zmien.",
     "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:",
-    "Permissions": "Permissions",
+    "Permissions": "Prístupové oprávnenia",
     "Please consult the release notes before performing a major upgrade.": "Pred spustením hlavnej aktualizácie si prosím prečítajte poznámky k vydaniu.",
     "Please set a GUI Authentication User and Password in the Settings dialog.": "Zadajte prosím prihlasovanie meno a heslo v dialógovom okne nastavení.",
     "Please wait": "Prosím čakajte",
@@ -224,7 +225,7 @@
     "Quick guide to supported patterns": "Rýchly sprievodca podporovanými vzormi",
     "RAM Utilization": "Využitie RAM",
     "Random": "Náhodne",
-    "Receive Only": "Receive Only",
+    "Receive Only": "Iba prijímanie",
     "Recent Changes": "Nedávne zmeny",
     "Reduced by ignore patterns": "Znížené o ignorované vzory",
     "Release Notes": "Poznámky k vydaniu",
@@ -237,7 +238,7 @@
     "Rescan": "Opakovať skenovanie",
     "Rescan All": "Opakovať skenovanie všetkých",
     "Rescan Interval": "Interval opakovania skenovania",
-    "Rescans": "Rescans",
+    "Rescans": "Opätovné skeny",
     "Restart": "Reštart",
     "Restart Needed": "Potrebný reštart",
     "Restarting": "Reštartovanie",
@@ -246,14 +247,14 @@
     "Resume": "Pokračovať",
     "Resume All": "Pokračuj so všetkými",
     "Reused": "Opakovane použité",
-    "Revert Local Changes": "Revert Local Changes",
-    "Running": "Running",
+    "Revert Local Changes": "Vrátiť lokálne zmeny",
+    "Running": "Beží",
     "Save": "Uložiť",
     "Scan Time Remaining": "Zostávajúci čas skenovania",
     "Scanning": "Skenovanie",
     "See external versioner help for supported templated command line parameters.": "See external versioner help for supported templated command line parameters.",
     "See external versioning help for supported templated command line parameters.": "See external versioning help for supported templated command line parameters.",
-    "Select All": "Select All",
+    "Select All": "Vybrať všetko",
     "Select a version": "Zvoliť verziu",
     "Select latest version": "Zvoliť najnovšiu verziu",
     "Select oldest version": "Zvoliť najstaršiu verziu",
@@ -268,7 +269,7 @@
     "Share With Devices": "Zdieľať so zariadeniami",
     "Share this folder?": "Zdieľať tento adresár?",
     "Shared With": "Zdieľané s",
-    "Sharing": "Sharing",
+    "Sharing": "Zdieľať",
     "Show ID": "Zobraziť ID",
     "Show QR": "Zobraziť QR",
     "Show diff with previous version": "Ukázať rozdiely s predchádzajúcou verziou",
@@ -295,11 +296,12 @@
     "Syncing": "Synchronizácia",
     "Syncthing has been shut down.": "Syncthing bol vypnutý.",
     "Syncthing includes the following software or portions thereof:": "Syncthing obsahuje nasledujúci software nebo jeho časti:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing je otvorený softvér s licenciou MPL v2.0.",
     "Syncthing is restarting.": "Syncthing sa reštartuje.",
     "Syncthing is upgrading.": "Syncthing sa aktualizuje.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing se zdá byť nefunkčný, alebo je problém s internetovým pripojením. Opakujem...",
     "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.": "Syncthing seems to be experiencing a problem processing your request. Please refresh the page or restart Syncthing if the problem persists.",
-    "Take me back": "Take me back",
+    "Take me back": "Späť",
     "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.",
     "The Syncthing admin interface is configured to allow remote access without a password.": "The Syncthing admin interface is configured to allow remote access without a password.",
     "The aggregated statistics are publicly available at the URL below.": "Súhrnné štatistiky sú verejne dostupné na uvedenej URL.",
@@ -314,7 +316,7 @@
     "The folder path cannot be blank.": "Cesta k adresáru nemôže byť prázdna.",
     "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.": "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.",
     "The following items could not be synchronized.": "The following items could not be synchronized.",
-    "The following items were changed locally.": "The following items were changed locally.",
+    "The following items were changed locally.": "Tieto položky boli zmenené lokálne",
     "The maximum age must be a number and cannot be blank.": "Maximálny vek musí byť číslo a nemôže byť prázdne.",
     "The maximum time to keep a version (in days, set to 0 to keep versions forever).": "The maximum time to keep a version (in days, set to 0 to keep versions forever).",
     "The minimum free disk space percentage must be a non-negative number between 0 and 100 (inclusive).": "Minimálne voľné miesto na disku v percentách musí byť kladné číslo medzi 0 a 100 (vrátane).",
@@ -351,20 +353,20 @@
     "Usage reporting is always enabled for candidate releases.": "Hlásenia o používaní sú pri kandidátoch na vydanie vždy povolené.",
     "Use HTTPS for GUI": "Použiť HTTPS pre grafické rozhranie",
     "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": "Bloky premenlivej veľkosti",
     "Variable size blocks (also \"large blocks\") are more efficient for large files.": "Variable size blocks (also \"large blocks\") are more efficient for large files.",
     "Version": "Verzia",
     "Versions": "Verzie",
     "Versions Path": "Cesta k verziám",
     "Versions are automatically deleted if they are older than the maximum age or exceed the number of files allowed in an interval.": "Verzie sú automaticky zmazané ak sú staršie ako je maximálny časový limit alebo presiahnu počet súborov povolených v danom intervale.",
-    "Waiting to scan": "Waiting to scan",
+    "Waiting to scan": "Čaká na sken",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolder%}\".": "Warning, this path is a parent directory of an existing folder \"{{otherFolder}}\".",
     "Warning, this path is a parent directory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Warning, this path is a parent directory of an existing folder \"{{otherFolderLabel}}\" ({{otherFolder}}).",
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolder%}\".": "Warning, this path is a subdirectory of an existing folder \"{{otherFolder}}\".",
     "Warning, this path is a subdirectory of an existing folder \"{%otherFolderLabel%}\" ({%otherFolder%}).": "Warning, this path is a subdirectory of an existing folder \"{{otherFolderLabel}}\" ({{otherFolder}}).",
     "Warning: If you are using an external watcher like {%syncthingInotify%}, you should make sure it is deactivated.": "Warning: If you are using an external watcher like {{syncthingInotify}}, you should make sure it is deactivated.",
-    "Watch for Changes": "Watch for Changes",
-    "Watching for Changes": "Watching for Changes",
+    "Watch for Changes": "Sleduj zmeny",
+    "Watching for Changes": "Sledujú sa zmeny",
     "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.": "When adding a new device, keep in mind that this device must be added on the other side too.",
     "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.": "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.",
@@ -372,9 +374,9 @@
     "You can also select one of these nearby devices:": "Môžete tiež vybrať jedno z týchto blízkych zariadení:",
     "You can change your choice at any time in the Settings dialog.": "Voľbu môžete kedykoľvek zmeniť v dialógu Nastavenia.",
     "You can read more about the two release channels at the link below.": "O dvoch vydávacích kanáloch si môžete viacej prečítať v odkaze nižšie.",
-    "You have no ignored devices.": "You have no ignored devices.",
-    "You have no ignored folders.": "You have no ignored folders.",
-    "You have unsaved changes. Do you really want to discard them?": "You have unsaved changes. Do you really want to discard them?",
+    "You have no ignored devices.": "Nemáte žiadne ignorované zariadenia.",
+    "You have no ignored folders.": "Nemáte žiadne ignorované priečinky.",
+    "You have unsaved changes. Do you really want to discard them?": "Niektoré zmeny ste neuložili. Chcete ich skutočne zahodiť?",
     "You must keep at least one version.": "Musíte ponechať aspoň jednu verziu",
     "days": "dní",
     "directories": "adresáre",

gui/default/assets/lang/lang-sv.json

@@ -1,5 +1,5 @@
 {
-    "A device with that ID is already added.": "En enhet med det ID är redan tillagt.",
+    "A device with that ID is already added.": "En enhet med det ID:t är redan tillagt.",
     "A negative number of days doesn't make sense.": "Ett negativt antal dagar är inte rimligt.",
     "A new major version may not be compatible with previous versions.": "En ny huvudversion kan eventuellt vara inkompatibel med tidigare versioner.",
     "API Key": "API-nyckel",
@@ -55,7 +55,7 @@
     "Copied from elsewhere": "Kopierat från annanstans",
     "Copied from original": "Kopierat från original",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 följande bidragare:",
-    "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 följande bidragande:",
+    "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 följande bidragsgivare:",
     "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 följande bidragsgivare:",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "Skapa ignorera mönster, skriver över en existerande fil på {{path}}.",
     "Danger!": "Fara!",
@@ -171,6 +171,7 @@
     "Log": "Logg",
     "Log tailing paused. Click here to continue.": "Loggning pausad. Klicka här för att fortsätta.",
     "Log tailing paused. Scroll to bottom continue.": "Loggning pausad. Rulla till botten för att fortsätta.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log fortsättning pausad. Bläddra till botten för att fortsätta.",
     "Logs": "Loggar",
     "Major Upgrade": "Större uppgradering",
     "Mass actions": "Massåtgärder",
@@ -295,6 +296,7 @@
     "Syncing": "Synkroniserar",
     "Syncthing has been shut down.": "Syncthing har stängts.",
     "Syncthing includes the following software or portions thereof:": "Syncthing innehåller följande mjukvarupaket eller delar av dem:",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing har fri och öppen källkod licensierad som MPL v2.0.",
     "Syncthing is restarting.": "Syncthing startar om.",
     "Syncthing is upgrading.": "Syncthing uppgraderas.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing verkar avstängd eller så är det problem med din Internetanslutning. Försöker igen...",

gui/default/assets/lang/lang-uk.json

@@ -171,6 +171,7 @@
     "Log": "Журнал",
     "Log tailing paused. Click here to continue.": "Перемотка журналу призупинена. Натиснути для продовження.",
     "Log tailing paused. Scroll to bottom continue.": "Висвітлення журналу призупинене. Прокрутіть нижче, щоби продовжити.",
+    "Log tailing paused. Scroll to the bottom to continue.": "Log tailing paused. Scroll to the bottom to continue.",
     "Logs": "Журнали",
     "Major Upgrade": "Мажорне оновлення",
     "Mass actions": "Масові операції",
@@ -295,6 +296,7 @@
     "Syncing": "Синхронізація",
     "Syncthing has been shut down.": "Syncthing вимкнено (закрито).",
     "Syncthing includes the following software or portions thereof:": "Syncthing містить наступне програмне забезпечення (або його частини):",
+    "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 перезавантажується.",
     "Syncthing is upgrading.": "Syncthing оновлюється.",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Схоже на те, що Syncthing закритий, або виникла проблема із Інтернет-з’єднанням. Проводиться повторна спроба з’єднання…",

gui/default/assets/lang/lang-zh-CN.json

@@ -171,6 +171,7 @@
     "Log": "日志",
     "Log tailing paused. Click here to continue.": "已暂停日志跟踪。点击此处以继续。",
     "Log tailing paused. Scroll to bottom continue.": "已暂停日志跟踪。滚动到底部以继续。",
+    "Log tailing paused. Scroll to the bottom to continue.": "已暂停日志跟踪。滚动到底部以继续。",
     "Logs": "日志",
     "Major Upgrade": "重大更新",
     "Mass actions": "批量操作",
@@ -295,6 +296,7 @@
     "Syncing": "同步中",
     "Syncthing has been shut down.": "Syncthing 已关闭。",
     "Syncthing includes the following software or portions thereof:": "Syncthing 使用了下列软件或其中的一部分：",
+    "Syncthing is Free and Open Source Software licensed as MPL v2.0.": "Syncthing 是个以 MPL v2.0 授权的免费开源软件。",
     "Syncthing is restarting.": "Syncthing 正在重启。",
     "Syncthing is upgrading.": "Syncthing 正在升级。",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing 似乎关闭了，或者您的网络连接存在故障。重试中…",

gui/default/assets/lang/lang-zh-TW.json

@@ -56,13 +56,13 @@
     "Copied from original": "從原處複製",
     "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 下列貢獻者：",
     "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 下列貢獻者：",
-    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 the following Contributors:",
+    "Copyright © 2014-2019 the following Contributors:": "Copyright © 2014-2019 下列貢獻者：",
     "Creating ignore patterns, overwriting an existing file at {%path%}.": "建立忽略樣式，覆蓋已存在的 {{path}}。",
-    "Danger!": "危險!",
+    "Danger!": "危險！",
     "Debugging Facilities": "除錯工具",
     "Default Folder Path": "預設資料夾路徑",
     "Deleted": "已刪除",
-    "Deselect All": "Deselect All",
+    "Deselect All": "取消選取全部",
     "Device": "裝置",
     "Device \"{%name%}\" ({%device%} at {%address%}) wants to connect. Add new device?": "裝置 \"{{name}}\" ({{device}} 位於 {{address}}) 想要連線。要增加新裝置嗎？",
     "Device ID": "裝置識別碼",
@@ -75,7 +75,7 @@
     "Disabled periodic scanning and disabled watching for changes": "已停用定期掃描及觀察變動",
     "Disabled periodic scanning and enabled watching for changes": "已停用定期掃描及啟用觀察變動",
     "Disabled periodic scanning and failed setting up watching for changes, retrying every 1m:": "已停用定期掃描，無法設定觀察變動，每 1 分鐘重試：",
-    "Discard": "Discard",
+    "Discard": "忽略",
     "Disconnected": "斷線",
     "Discovered": "已發現",
     "Discovery": "探索",
@@ -116,7 +116,7 @@
     "Files are protected from changes made on other devices, but changes made on this device will be sent to the rest of the cluster.": "其他裝置做的改變不會影響此裝置上的檔案，但在此裝置上的變動將被發送到叢集的其他部分。",
     "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.": "Files are synchronized from the cluster, but any changes made locally will not be sent to other devices.",
     "Filesystem Notifications": "檔案系統通知",
-    "Filesystem Watcher Errors": "檔案系統監視器錯誤\n",
+    "Filesystem Watcher Errors": "檔案系統監視器錯誤",
     "Filter by date": "以日期篩選",
     "Filter by name": "以名稱篩選",
     "Folder": "資料夾",
@@ -144,9 +144,9 @@
     "Ignore": "忽略",
     "Ignore Patterns": "忽略樣式",
     "Ignore Permissions": "忽略權限",
-    "Ignored Devices": "Ignored Devices",
-    "Ignored Folders": "Ignored Folders",
-    "Ignored at": "Ignored at",
+    "Ignored Devices": "已忽略的裝置",
+    "Ignored Folders": "已忽略的資料夾",
+    "Ignored at": "忽略時間",
     "Incoming Rate Limit (KiB/s)": "傳入速率限制 (KiB/s)",
     "Incorrect configuration may damage your folder contents and render Syncthing inoperable.": "不正確的設定可能會損壞您的資料夾內容，並導致 Syncthing 不正常運作。",
     "Introduced By": "引入自",
@@ -160,17 +160,18 @@
     "Later": "稍後",
     "Latest Change": "最近變動",
     "Learn more": "瞭解更多",
-    "Limit": "Limit",
+    "Limit": "限制",
     "Listeners": "監聽者",
     "Loading data...": "正在載入資料...",
     "Loading...": "正在載入...",
     "Local Discovery": "本機探索",
     "Local State": "本機狀態",
     "Local State (Total)": "本機狀態 (總結)",
-    "Locally Changed Items": "Locally Changed Items",
+    "Locally Changed Items": "本地變動項目",
     "Log": "日誌",
     "Log tailing paused. Click here to continue.": "跟隨日誌暫停。點選這裡以繼續。",
     "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": "日誌",
     "Major Upgrade": "重大更新",
     "Mass actions": "大量操作",
@@ -209,7 +210,7 @@
     "Pause": "暫停",
     "Pause All": "全部暫停",
     "Paused": "暫停",
-    "Pending changes": "Pending changes",
+    "Pending changes": "等待中的變動",
     "Periodic scanning at given interval and disabled watching for changes": "在一定的時間間隔，定期掃描及關閉觀察變動",
     "Periodic scanning at given interval and enabled watching for changes": "在一定的時間間隔，定期掃描及啟用觀察變動",
     "Periodic scanning at given interval and failed setting up watching for changes, retrying every 1m:": "在一定的時間間隔，定期掃描，無法設定觀察變動，每 1 分鐘重試：",
@@ -224,7 +225,7 @@
     "Quick guide to supported patterns": "可支援樣式的快速指南",
     "RAM Utilization": "記憶體使用量",
     "Random": "隨機",
-    "Receive Only": "僅接收\n",
+    "Receive Only": "僅接收",
     "Recent Changes": "最近變動",
     "Reduced by ignore patterns": "已由忽略樣式縮減",
     "Release Notes": "版本資訊",
@@ -295,6 +296,7 @@
     "Syncing": "正在同步",
     "Syncthing has been shut down.": "Syncthing 已經關閉。",
     "Syncthing includes the following software or portions thereof:": "Syncthing 包括以下軟體或其中的一部分：",
+    "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 正在重新啟動。",
     "Syncthing is upgrading.": "Syncthing 正在進行升級。",
     "Syncthing seems to be down, or there is a problem with your Internet connection. Retrying…": "Syncthing 似乎離線了，或者您的網際網路連線出現問題。正在重試...",

gui/default/index.html

@@ -337,7 +337,7 @@
             </button>
             <div id="folder-{{$index}}" class="panel-collapse collapse">
               <div class="panel-body">
-                <table class="table table-condensed table-striped">
+                <table class="table table-condensed table-striped table-auto">
                   <tbody>
                     <tr ng-show="folder.label != undefined && folder.label.length > 0">
                       <th><span class="fas fa-fw fa-info-circle"></span>&nbsp;<span translate>Folder ID</span></th>
@@ -506,7 +506,7 @@
                   <button type="button" class="btn btn-default btn-sm" ng-click="restoreVersions.show(folder.id)" ng-if="folder.versioning.type">
                     <span class="fas fa-undo"></span>&nbsp;<span translate>Versions</span>
                   </button>
-                  <button type="button" class="btn btn-sm btn-default" ng-click="rescanFolder(folder.id)" ng-disabled="['idle', 'stopped', 'unshared', 'outofsync'].indexOf(folderStatus(folder)) < 0">
+                  <button type="button" class="btn btn-sm btn-default" ng-click="rescanFolder(folder.id)" ng-disabled="['idle', 'stopped', 'unshared', 'outofsync', 'faileditems'].indexOf(folderStatus(folder)) < 0">
                     <span class="fas fa-refresh"></span>&nbsp;<span translate>Rescan</span>
                   </button>
                   <button type="button" class="btn btn-sm btn-default" ng-click="editFolder(folder)">
@@ -551,7 +551,7 @@
           </button>
           <div id="device-this" class="panel-collapse collapse in">
             <div class="panel-body">
-              <table class="table table-condensed table-striped">
+              <table class="table table-condensed table-striped table-auto">
                 <tbody>
                   <tr>
                     <th><span class="fas fa-fw fa-cloud-download-alt"></span>&nbsp;<span translate>Download Rate</span></th>
@@ -667,7 +667,7 @@
             </button>
             <div id="device-{{$index}}" class="panel-collapse collapse">
               <div class="panel-body">
-                <table class="table table-condensed table-striped">
+                <table class="table table-condensed table-striped table-auto">
                   <tbody>
                     <tr ng-if="connections[deviceCfg.deviceID].connected">
                       <th><span class="fas fa-fw fa-cloud-download-alt"></span>&nbsp;<span translate>Download Rate</span></th>
@@ -715,8 +715,14 @@
                         </span>
                       </td>
                       <td ng-if="!connections[deviceCfg.deviceID].connected" class="text-right">
-                        <span ng-repeat="addr in deviceCfg.addresses"><span tooltip data-original-title="{{'Configured' | translate}}">{{addr}}</span><br></span>
-                        <span ng-repeat="addr in discoveryCache[deviceCfg.deviceID].addresses"><span tooltip data-original-title="{{'Discovered' | translate}}">{{addr}}</span><br></span>
+                        <span ng-repeat="addr in deviceCfg.addresses">
+                            <span tooltip data-original-title="{{'Configured' | translate}}">{{addr}}</span><br>
+                            <small ng-if="system.lastDialStatus[addr].error" tooltip data-original-title="{{system.lastDialStatus[addr].error}}" class="text-danger">{{abbreviatedError(addr)}}<br></small>
+                        </span>
+                        <span ng-repeat="addr in discoveryCache[deviceCfg.deviceID].addresses">
+                          <span tooltip data-original-title="{{'Discovered' | translate}}">{{addr}}</span><br>
+                          <small ng-if="system.lastDialStatus[addr].error" tooltip data-original-title="{{system.lastDialStatus[addr].error}}" class="text-danger">{{abbreviatedError(addr)}}<br></small>
+                        </span>
                       </td>
                     </tr>
                     <tr ng-if="connections[deviceCfg.deviceID].connected && connections[deviceCfg.deviceID].type.indexOf('Relay') > -1" tooltip data-original-title="Connections via relays might be rate limited by the relay">

gui/default/syncthing/app.js

@@ -179,7 +179,7 @@ function buildTree(children) {
                     key: keySoFar.join('/'),
                     folder: true,
                     children: []
-                }
+                };
                 parent.children.push(child);
                 parent = child;
             }
@@ -209,7 +209,7 @@ function unitPrefixed(input, binary) {
     var i = '';
     if (binary) {
         factor = 1024;
-        i = 'i'
+        i = 'i';
     }
     if (input > factor * factor * factor * factor * 1000) {
         // Don't show any decimals for more than 4 digits

gui/default/syncthing/core/aboutModalView.html

@@ -14,7 +14,7 @@
     <p translate>Copyright &copy; 2014-2019 the following Contributors:</p>
     <div class="row">
       <div class="col-md-12" id="contributor-list">
-Jakob Borg, Audrius Butkevicius, Simon Frei, Alexander Graf, Alexandre Viau, Anderson Mesquita, Antony Male, Ben Schulz, Caleb Callaway, Daniel Harte, Lars K.W. Gohlke, Lode Hoste, Michael Ploujnikov, Nate Morrison, Philippe Schommers, Ryan Sullivan, Sergey Mishin, Stefan Tatschner, Wulf Weich, Aaron Bieber, Adam Piggott, Adel Qalieh, Alessandro G., Andrew Dunham, Andrew Rabert, Andrey D, Antoine Lamielle, Aranjedeath, Arthur Axel fREW Schmidt, BAHADIR YILMAZ, Bart De Vries, Ben Curthoys, Ben Shepherd, Ben Sidhom, Benedikt Heine, Benedikt Morbach, Benno Fünfstück, Benny Ng, Boris Rybalkin, Brandon Philips, Brendan Long, Brian R. Becker, Carsten Hagemann, Cathryne Linenweaver, Cedric Staniewski, Chris Howie, Chris Joel, Chris Tonkinson, Colin Kennedy, Cromefire_, Dale Visser, Daniel Bergmann, Daniel Martí, Darshil Chanpura, David Rimmer, Denis A., Dennis Wilson, Dmitry Saveliev, Dominik Heidler, Elias Jarlebring, Elliot Huffman, Emil Hessman, Erik Meitner, Evgeny Kuznetsov, Federico Castagnini, Felix Ableitner, Felix Unterpaintner, Francois-Xavier Gsell, Frank Isemann, Gilli Sigurdsson, Graham Miln, Han Boetes, Harrison Jones, Heiko Zuerker, Hugo Locurcio, Iain Barnett, Ian Johnson, Iskander Sharipov, Jaakko Hannikainen, Jacek Szafarkiewicz, Jake Peterson, James Patterson, Jaroslav Malec, Jaya Chithra, Jens Diemer, Jerry Jacobs, Jochen Voss, Johan Andersson, Johan Vromans, John Rinehart, Jonas Thelemann, Jonathan Cross, Jose Manuel Delicado, Jörg Thalheim, Karol Różycki, Keith Turner, Kelong Cong, Ken'ichi Kamada, Kevin Allen, Kevin White, Jr., Kurt Fitzner, Laurent Arnoud, Laurent Etiemble, Leo Arias, Liu Siyuan, Lord Landon Agahnim, Majed Abdulaziz, Marc Laporte, Marc Pujol, Marcin Dziadus, Mark Pulford, Mateusz Naściszewski, Matic Potočnik, Matt Burke, Matt Robenolt, Matteo Ruina, Maurizio Tomasi, Max Schulze, MaximAL, Maxime Thirouin, Michael Jephcote, Michael Tilli, Mike Boone, MikeLund, Nicholas Rishel, Nico Stapelbroek, Nicolas Braud-Santoni, Niels Peter Roest, Nils Jakobi, NoLooseEnds, Oyebanji Jacob Mayowa, Pascal Jungblut, Pawel Palenica, Paweł Rozlach, Peter Badida, Peter Dave Hello, Peter Hoeg, Peter Marquardt, Phil Davis, Phill Luby, Pier Paolo Ramon, Piotr Bejda, Pramodh KP, Richard Hartmann, Robert Carosi, Roman Zaynetdinov, Ross Smith II, Sacheendra Talluri, Scott Klupfel, Sly_tom_cat, Stefan Kuntz, Suhas Gundimeda, Taylor Khan, Thomas Hipp, Tim Abell, Tim Howes, Tobias Nygren, Tobias Tom, Tomas Cerveny, Tommy Thorn, Tully Robinson, Tyler Brazier, Unrud, Veeti Paananen, Victor Buinsky, Vil Brekin, Vladimir Rusinov, William A. Kennington III, Xavier O., Yannic A., andresvia, andyleap, chucic, derekriemer, desbma, georgespatton, janost, jaseg, klemens, marco-m, otbutz, perewa, rubenbe, wangguoliang, xjtdy888, 佛跳墙
+Jakob Borg, Audrius Butkevicius, Simon Frei, Alexander Graf, Alexandre Viau, Anderson Mesquita, Antony Male, Ben Schulz, Caleb Callaway, Daniel Harte, Lars K.W. Gohlke, Lode Hoste, Michael Ploujnikov, Nate Morrison, Philippe Schommers, Ryan Sullivan, Sergey Mishin, Stefan Tatschner, Wulf Weich, Aaron Bieber, Adam Piggott, Adel Qalieh, Alessandro G., Andrew Dunham, Andrew Rabert, Andrey D, André Colomb, Antoine Lamielle, Aranjedeath, Arthur Axel fREW Schmidt, BAHADIR YILMAZ, Bart De Vries, Ben Curthoys, Ben Shepherd, Ben Sidhom, Benedikt Heine, Benedikt Morbach, Benno Fünfstück, Benny Ng, Boris Rybalkin, Brandon Philips, Brendan Long, Brian R. Becker, Carsten Hagemann, Cathryne Linenweaver, Cedric Staniewski, Chris Howie, Chris Joel, Chris Tonkinson, Colin Kennedy, Cromefire_, Dale Visser, Daniel Bergmann, Daniel Martí, Darshil Chanpura, David Rimmer, Denis A., Dennis Wilson, Dmitry Saveliev, Dominik Heidler, Elias Jarlebring, Elliot Huffman, Emil Hessman, Erik Meitner, Evgeny Kuznetsov, Federico Castagnini, Felix Ableitner, Felix Unterpaintner, Francois-Xavier Gsell, Frank Isemann, Gilli Sigurdsson, Graham Miln, Han Boetes, Harrison Jones, Heiko Zuerker, Hugo Locurcio, Iain Barnett, Ian Johnson, Iskander Sharipov, Jaakko Hannikainen, Jacek Szafarkiewicz, Jake Peterson, James Patterson, Jaroslav Malec, Jaya Chithra, Jens Diemer, Jerry Jacobs, Jochen Voss, Johan Andersson, Johan Vromans, John Rinehart, Jonas Thelemann, Jonathan Cross, Jose Manuel Delicado, Jörg Thalheim, Kalle Laine, Karol Różycki, Keith Turner, Kelong Cong, Ken'ichi Kamada, Kevin Allen, Kevin White, Jr., Kurt Fitzner, Laurent Arnoud, Laurent Etiemble, Leo Arias, Liu Siyuan, Lord Landon Agahnim, Majed Abdulaziz, Marc Laporte, Marc Pujol, Marcin Dziadus, Mark Pulford, Mateusz Naściszewski, Matic Potočnik, Matt Burke, Matt Robenolt, Matteo Ruina, Maurizio Tomasi, Max Schulze, MaximAL, Maxime Thirouin, Michael Jephcote, Michael Tilli, Mike Boone, MikeLund, Mingxuan Lin, Nicholas Rishel, Nico Stapelbroek, Nicolas Braud-Santoni, Niels Peter Roest, Nils Jakobi, Nitroretro, NoLooseEnds, Oyebanji Jacob Mayowa, Pascal Jungblut, Pawel Palenica, Paweł Rozlach, Peter Badida, Peter Dave Hello, Peter Hoeg, Peter Marquardt, Phil Davis, Phill Luby, Pier Paolo Ramon, Piotr Bejda, Pramodh KP, Richard Hartmann, Robert Carosi, Roman Zaynetdinov, Ross Smith II, Sacheendra Talluri, Scott Klupfel, Sly_tom_cat, Stefan Kuntz, Suhas Gundimeda, Taylor Khan, Thomas Hipp, Tim Abell, Tim Howes, Tobias Nygren, Tobias Tom, Tom Jakubowski, Tomas Cerveny, Tommy Thorn, Tully Robinson, Tyler Brazier, Unrud, Veeti Paananen, Victor Buinsky, Vil Brekin, Vladimir Rusinov, William A. Kennington III, Xavier O., Yannic A., andresvia, andyleap, chucic, dependabot-preview[bot], dependabot[bot], derekriemer, desbma, georgespatton, janost, jaseg, klemens, marco-m, otbutz, perewa, rubenbe, wangguoliang, xjtdy888, 佛跳墙
     </div>
     </div>
     <hr />

gui/default/syncthing/core/identiconDirective.js

@@ -23,7 +23,6 @@ angular.module('syncthing.core')
 
                 svg.appendChild(rect);
             };
-            var rect;
             var row;
             var col;
             var middleCol;

gui/default/syncthing/core/localeService.js

@@ -8,7 +8,6 @@ angular.module('syncthing.core')
                 var uid = new Date();
                 var storage = window.localStorage;
                 storage.setItem(uid, uid);
-                var success = storage.getItem(uid) == uid;
                 storage.removeItem(uid);
                 return storage;
             } catch (exception) {

gui/default/syncthing/core/logViewerModalView.html

@@ -9,7 +9,7 @@
       <div id="log-viewer-log" class="tab-pane in active">
         <label translate ng-if="logging.logEntries.length == 0">Loading...</label>
         <textarea id="logViewerText" class="form-control" rows="20" ng-if="logging.logEntries.length != 0" readonly style="font-family: Consolas; font-size: 11px; overflow: auto;">{{ logging.content() }}</textarea>
-        <p translate class="help-block" ng-style="{'visibility': logging.paused ? 'visible' : 'hidden'}">Log tailing paused. Scroll to bottom continue.</p>
+        <p translate class="help-block" ng-style="{'visibility': logging.paused ? 'visible' : 'hidden'}">Log tailing paused. Scroll to the bottom to continue.</p>
       </div>
 
       <div id="log-viewer-facilities" class="tab-pane">

gui/default/syncthing/core/majorUpgradeModalView.html

@@ -6,7 +6,7 @@
       <span translate>Please consult the release notes before performing a major upgrade.</span>
     </p>
     <p>
-      <a href="https://github.com/syncthing/syncthing/releases/tag/{{upgradeInfo.latest}}" target="_blank" translate>Release Notes</a>
+      <a ng-href="https://github.com/syncthing/syncthing/releases/tag/{{upgradeInfo.latest}}" target="_blank" translate>Release Notes</a>
     </p>
   </div>
   <div class="modal-footer">

gui/default/syncthing/core/notifications.html

@@ -69,3 +69,50 @@
     </div>
   </div>
 </notification>
+
+<notification id="crAutoEnabled">
+  <div class="panel panel-success">
+    <div class="panel-heading">
+      <h3 class="panel-title"><span class="fas fa-bolt"></span>&ensp;<span translate>Automatic Crash Reporting</span></h3>
+    </div>
+    <div class="panel-body">
+      <p translate>Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.</p>
+      <p><a href="https://docs.syncthing.net/users/crashrep.html"><span class="fas fa-info-circle"></span>&nbsp;<span translate>Learn more</span></a></p>
+    </div>
+    <div class="panel-footer clearfix">
+      <div class="pull-right">
+        <button type="button" class="btn btn-danger" ng-click="setCrashReportingEnabled(false); dismissNotification('crAutoEnabled')">
+          <span class="fas fa-times"></span>&nbsp;<span translate>Disable Crash Reporting</span>
+        </button>
+        <button type="button" class="btn btn-default" ng-click="dismissNotification('crAutoEnabled')">
+          <span class="fas fa-check"></span>&nbsp;<span translate>OK</span>
+        </button>
+      </div>
+      <div class="clearfix"></div>
+    </div>
+  </div>
+</notification>
+
+<notification id="crAutoDisabled">
+  <div class="panel panel-success">
+    <div class="panel-heading">
+      <h3 class="panel-title"><span class="fas fa-bolt"></span>&ensp;<span translate>Automatic Crash Reporting</span></h3>
+    </div>
+    <div class="panel-body">
+      <p translate>Syncthing now supports automatically reporting crashes to the developers. This feature is enabled by default.</p>
+      <p translate>However, your current settings indicate you might not want it enabled. We have disabled automatic crash reporting for you.</p>
+      <p><a href="https://docs.syncthing.net/users/crashrep.html"><span class="fas fa-info-circle"></span>&nbsp;<span translate>Learn more</span></a></p>
+    </div>
+    <div class="panel-footer clearfix">
+      <div class="pull-right">
+        <button type="button" class="btn btn-success" ng-click="setCrashReportingEnabled(true); dismissNotification('crAutoDisabled')">
+          <span class="fas fa-check"></span>&nbsp;<span translate>Enable Crash Reporting</span>
+        </button>
+        <button type="button" class="btn btn-default" ng-click="dismissNotification('crAutoDisabled')">
+          <span class="fas fa-times"></span>&nbsp;<span translate>OK</span>
+        </button>
+      </div>
+      <div class="clearfix"></div>
+    </div>
+  </div>
+</notification>

gui/default/syncthing/core/syncthingController.js

@@ -78,7 +78,6 @@ angular.module('syncthing.core')
             externalCommand: "",
             autoNormalize: true,
             path: "",
-            useLargeBlocks: true,
         };
 
         $scope.localStateTotal = {
@@ -329,7 +328,7 @@ angular.module('syncthing.core')
         });
 
         $scope.$on(Events.FOLDER_ERRORS, function (event, arg) {
-            $scope.model[arg.data.folder].pullErrors = arg.data.errors.length;
+            $scope.model[arg.data.folder].errors = arg.data.errors.length;
         });
 
         $scope.$on(Events.FOLDER_SCAN_PROGRESS, function (event, arg) {
@@ -357,7 +356,7 @@ angular.module('syncthing.core')
                         recalcLocalStateTotal();
                         console.log("refreshFolder", folder, data);
                     }).error($scope.emitHTTPError);
-                }, 1000, true);
+                }, 1000);
             }
             debouncedFuncs[key]();
         }
@@ -479,7 +478,7 @@ angular.module('syncthing.core')
                 $scope.completion[device]._needItems = 0;
             } else {
                 $scope.completion[device]._total = Math.floor(100 * (1 - needed / total));
-                $scope.completion[device]._needBytes = needed
+                $scope.completion[device]._needBytes = needed;
                 $scope.completion[device]._needItems = items + deletes;
             }
 
@@ -561,6 +560,9 @@ angular.module('syncthing.core')
         }
 
         function refreshNeed(folder) {
+            if (!$scope.neededFolder) {
+                return;
+            }
             var url = urlbase + "/db/need?folder=" + encodeURIComponent(folder);
             url += "&page=" + $scope.neededCurrentPage;
             url += "&perpage=" + $scope.neededPageSize;
@@ -653,7 +655,10 @@ angular.module('syncthing.core')
         };
 
         $scope.refreshFailed = function (page, perpage) {
-            var url = urlbase + '/folder/pullerrors?folder=' + encodeURIComponent($scope.failed.folder);
+            if (!$scope.failed) {
+                return;
+            }
+            var url = urlbase + '/folder/errors?folder=' + encodeURIComponent($scope.failed.folder);
             url += "&page=" + page + "&perpage=" + perpage;
             $http.get(url).success(function (data) {
                 $scope.failed = data;
@@ -661,13 +666,14 @@ angular.module('syncthing.core')
         };
 
         $scope.refreshRemoteNeed = function (folder, page, perpage) {
+            if (!$scope.remoteNeedDevice) {
+                return;
+            }
             var url = urlbase + '/db/remoteneed?device=' + $scope.remoteNeedDevice.deviceID;
             url += '&folder=' + encodeURIComponent(folder);
             url += "&page=" + page + "&perpage=" + perpage;
             $http.get(url).success(function (data) {
-                if ($scope.remoteNeedDevice !== '') {
-                    $scope.remoteNeed[folder] = data;
-                }
+                $scope.remoteNeed[folder] = data;
             }).error(function (err) {
                 $scope.remoteNeed[folder] = undefined;
                 $scope.emitHTTPError(err);
@@ -675,8 +681,11 @@ angular.module('syncthing.core')
         };
 
         $scope.refreshLocalChanged = function (page, perpage) {
+            if (!$scope.localChangedFolder) {
+                return;
+            }
             var url = urlbase + '/db/localchanged?folder=';
-            url += encodeURIComponent($scope.localChanged.folder);
+            url += encodeURIComponent($scope.localChangedFolder);
             url += "&page=" + page + "&perpage=" + perpage;
             $http.get(url).success(function (data) {
                 $scope.localChanged = data;
@@ -717,6 +726,11 @@ angular.module('syncthing.core')
 
         var refreshGlobalChanges = debounce(function () {
             $http.get(urlbase + "/events/disk?limit=25").success(function (data) {
+                if (!data) {
+                    // For reasons unknown this is called with data being the empty
+                    // string on shutdown, causing an error on .reverse().
+                    return;
+                }
                 data = data.reverse();
                 $scope.globalChangeEvents = data;
                 console.log("refreshGlobalChanges", data);
@@ -1172,7 +1186,7 @@ angular.module('syncthing.core')
                     }
                 });
             }
-        }
+        };
 
         $scope.editSettings = function () {
             // Make a working copy
@@ -1253,7 +1267,7 @@ angular.module('syncthing.core')
             var ignoredFoldersEquals = angular.equals($scope.config.devices, $scope.tmpDevices);
             console.log("settings equals - options: " + optionsEqual + " gui: " + guiEquals + " ignDev: " + ignoredDevicesEquals + " ignFol: " + ignoredFoldersEquals);
             return !optionsEqual || !guiEquals || !ignoredDevicesEquals || !ignoredFoldersEquals;
-        }
+        };
 
         $scope.saveSettings = function () {
             // Make sure something changed
@@ -1534,7 +1548,7 @@ angular.module('syncthing.core')
 
         $scope.thisDevice = function () {
             return $scope.thisDeviceIn($scope.devices);
-        }
+        };
 
         $scope.thisDeviceIn = function (l) {
             for (var i = 0; i < l.length; i++) {
@@ -1573,7 +1587,7 @@ angular.module('syncthing.core')
                 }
             });
             return errs;
-        }
+        };
 
         $scope.friendlyDevices = function (str) {
             for (var i = 0; i < $scope.devices.length; i++) {
@@ -1888,7 +1902,7 @@ angular.module('syncthing.core')
             }
             var label = $scope.folders[folderID].label;
             return label && label.length > 0 ? label : folderID;
-        }
+        };
 
         $scope.deleteFolder = function (id) {
             $('#editFolder').modal('hide');
@@ -2193,7 +2207,7 @@ angular.module('syncthing.core')
             if (!$scope.model[folder]) {
                 return false;
             }
-            return $scope.model[folder].pullErrors !== 0;
+            return $scope.model[folder].errors !== 0;
         };
 
         $scope.override = function (folder) {
@@ -2201,10 +2215,11 @@ angular.module('syncthing.core')
         };
 
         $scope.showLocalChanged = function (folder) {
-            $scope.localChanged.folder = folder;
+            $scope.localChangedFolder = folder;
             $scope.localChanged = $scope.refreshLocalChanged(1, 10);
             $('#localChanged').modal().one('hidden.bs.modal', function () {
                 $scope.localChanged = {};
+                $scope.localChangedFolder = undefined;
             });
         };
 
@@ -2406,4 +2421,19 @@ angular.module('syncthing.core')
                 $scope.saveConfig();
             }
         };
+
+        $scope.abbreviatedError = function (addr) {
+            var status = $scope.system.lastDialStatus[addr];
+            if (!status || !status.error) {
+                return null;
+            }
+            var time = $filter('date')(status.when, "HH:mm:ss")
+            var err = status.error.replace(/.+: /, '');
+            return err + " (" + time + ")";
+        }
+
+        $scope.setCrashReportingEnabled = function (enabled) {
+            $scope.config.options.crashReportingEnabled = enabled;
+            $scope.saveConfig();
+        };
     });

gui/default/syncthing/folder/editFolderModalView.html

@@ -155,8 +155,6 @@
                 <div class="col-md-6">
                   <input type="checkbox" ng-model="currentFolder.fsWatcherEnabled" ng-change="fsWatcherToggled()" tooltip data-original-title="{{'Use notifications from the filesystem to detect changed items.' | translate }}">&nbsp;<span translate>Watch for Changes</span>
                   <p translate class="help-block">Watching for changes discovers most changes without periodic scanning.</p>
-                  <input type="checkbox" ng-model="currentFolder.useLargeBlocks"> <span translate>Variable Size Blocks</span>
-                  <p translate class="help-block">Variable size blocks (also "large blocks") are more efficient for large files.</p>
                 </div>
                 <div class="col-md-6">
                   <label for="rescanIntervalS" translate>Full Rescan Interval (s)</label>

gui/default/syncthing/transfer/failedFilesModalView.html

@@ -12,7 +12,7 @@
     </table>
     <dir-pagination-controls on-page-change="refreshFailed(newPageNumber, failed.perpage)" pagination-id="failed"></dir-pagination-controls>
     <ul class="pagination pull-right">
-      <li ng-repeat="option in [10, 25, 50]" ng-class="{ active: failed.page == option }">
+      <li ng-repeat="option in [10, 25, 50]" ng-class="{ active: failed.perpage == option }">
         <a href="#" ng-click="refreshFailed(failed.page, option)">{{option}}</a>
       </li>
     </ul>

gui/default/syncthing/transfer/localChangedFilesModalView.html

@@ -10,14 +10,14 @@
           <th translate>Size</th>
         </tr>
       </thead>
-      <tr dir-paginate="file in localChanged.files | itemsPerPage: localChanged.perpage" current-page="localChanged.page" total-items="model[localChanged.folder].receiveOnlyTotalItems" pagination-id="localChanged">
+      <tr dir-paginate="file in localChanged.files | itemsPerPage: localChanged.perpage" current-page="localChanged.page" total-items="model[localChangedFolder].receiveOnlyTotalItems" pagination-id="localChanged">
         <td>{{file.name}}</td>
         <td><span ng-hide="file.type == 'DIRECTORY'">{{file.size | binary}}B</span></td>
       </tr>
     </table>
     <dir-pagination-controls on-page-change="refreshLocalChanged(newPageNumber, localChanged.perpage)" pagination-id="localChanged"></dir-pagination-controls>
     <ul class="pagination pull-right">
-      <li ng-repeat="option in [10, 25, 50]" ng-class="{ active: localChanged.page == option }">
+      <li ng-repeat="option in [10, 25, 50]" ng-class="{ active: localChanged.perpage == option }">
         <a href="#" ng-click="refreshLocalChanged(localChanged.page, option)">{{option}}</a>
       </li>
     </ul>

lib/api/api.go

@@ -898,7 +898,8 @@ func (s *service) getSystemStatus(w http.ResponseWriter, r *http.Request) {
 		res["discoveryErrors"] = discoErrors
 	}
 
-	res["connectionServiceStatus"] = s.connectionsService.Status()
+	res["connectionServiceStatus"] = s.connectionsService.ListenerStatus()
+	res["lastDialStatus"] = s.connectionsService.ConnectionStatus()
 	// cpuUsage.Rate() is in milliseconds per second, so dividing by ten
 	// gives us percent
 	res["cpuPercent"] = s.cpu.Rate() / 10 / float64(runtime.NumCPU())
@@ -960,10 +961,10 @@ func (s *service) getSupportBundle(w http.ResponseWriter, r *http.Request) {
 	var files []fileEntry
 
 	// Redacted configuration as a JSON
-	if jsonConfig, err := json.MarshalIndent(getRedactedConfig(s), "", "  "); err == nil {
-		files = append(files, fileEntry{name: "config.json.txt", data: jsonConfig})
-	} else {
+	if jsonConfig, err := json.MarshalIndent(getRedactedConfig(s), "", "  "); err != nil {
 		l.Warnln("Support bundle: failed to create config.json:", err)
+	} else {
+		files = append(files, fileEntry{name: "config.json.txt", data: jsonConfig})
 	}
 
 	// Log as a text
@@ -976,9 +977,9 @@ func (s *service) getSupportBundle(w http.ResponseWriter, r *http.Request) {
 	// Errors as a JSON
 	if errs := s.guiErrors.Since(time.Time{}); len(errs) > 0 {
 		if jsonError, err := json.MarshalIndent(errs, "", "  "); err != nil {
-			files = append(files, fileEntry{name: "errors.json.txt", data: jsonError})
-		} else {
 			l.Warnln("Support bundle: failed to create errors.json:", err)
+		} else {
+			files = append(files, fileEntry{name: "errors.json.txt", data: jsonError})
 		}
 	}
 

lib/api/api_test.go

@@ -35,9 +35,14 @@ import (
 	"github.com/thejerf/suture"
 )
 
+var (
+	confDir = filepath.Join("testdata", "config")
+	token   = filepath.Join(confDir, "csrftokens.txt")
+)
+
 func TestMain(m *testing.M) {
 	orig := locations.GetBaseDir(locations.ConfigBaseDir)
-	locations.SetBaseDir(locations.ConfigBaseDir, "testdata/config")
+	locations.SetBaseDir(locations.ConfigBaseDir, confDir)
 
 	exitCode := m.Run()
 
@@ -47,6 +52,15 @@ func TestMain(m *testing.M) {
 }
 
 func TestCSRFToken(t *testing.T) {
+	defer os.Remove(token)
+
+	max := 250
+	int := 5
+	if testing.Short() {
+		max = 20
+		int = 2
+	}
+
 	t1 := newCsrfToken()
 	t2 := newCsrfToken()
 
@@ -55,8 +69,8 @@ func TestCSRFToken(t *testing.T) {
 		t.Fatal("t3 should be valid")
 	}
 
-	for i := 0; i < 250; i++ {
-		if i%5 == 0 {
+	for i := 0; i < max; i++ {
+		if i%int == 0 {
 			// t1 and t2 should remain valid by virtue of us checking them now
 			// and then.
 			if !validCsrfToken(t1) {
@@ -89,6 +103,7 @@ func TestStopAfterBrokenConfig(t *testing.T) {
 	w := config.Wrap("/dev/null", cfg)
 
 	srv := New(protocol.LocalDeviceID, w, "", "syncthing", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, false).(*service)
+	defer os.Remove(token)
 	srv.started = make(chan string)
 
 	sup := suture.New("test", suture.Spec{
@@ -499,6 +514,7 @@ func startHTTP(cfg *mockedConfig) (string, error) {
 	urService := ur.New(cfg, m, connections, false)
 	summaryService := model.NewFolderSummaryService(cfg, m, protocol.LocalDeviceID)
 	svc := New(protocol.LocalDeviceID, cfg, assetDir, "syncthing", m, eventSub, diskEventSub, discoverer, connections, urService, summaryService, errorLog, systemLog, cpu, nil, false).(*service)
+	defer os.Remove(token)
 	svc.started = addrChan
 
 	// Actually start the API service
@@ -960,6 +976,7 @@ func TestEventMasks(t *testing.T) {
 	defSub := new(mockedEventSub)
 	diskSub := new(mockedEventSub)
 	svc := New(protocol.LocalDeviceID, cfg, "", "syncthing", nil, defSub, diskSub, nil, nil, nil, nil, nil, nil, nil, nil, false).(*service)
+	defer os.Remove(token)
 
 	if mask := svc.getEventMask(""); mask != DefaultEventMask {
 		t.Errorf("incorrect default mask %x != %x", int64(mask), int64(DefaultEventMask))

lib/api/mocked_config_test.go

@@ -74,51 +74,55 @@ func (c *mockedConfig) AddOrUpdatePendingDevice(device protocol.DeviceID, name,
 
 func (c *mockedConfig) AddOrUpdatePendingFolder(id, label string, device protocol.DeviceID) {}
 
-func (m *mockedConfig) MyName() string {
+func (c *mockedConfig) MyName() string {
 	return ""
 }
 
-func (m *mockedConfig) ConfigPath() string {
+func (c *mockedConfig) ConfigPath() string {
 	return ""
 }
 
-func (m *mockedConfig) SetGUI(gui config.GUIConfiguration) (config.Waiter, error) {
+func (c *mockedConfig) SetGUI(gui config.GUIConfiguration) (config.Waiter, error) {
 	return noopWaiter{}, nil
 }
 
-func (m *mockedConfig) SetOptions(opts config.OptionsConfiguration) (config.Waiter, error) {
+func (c *mockedConfig) SetOptions(opts config.OptionsConfiguration) (config.Waiter, error) {
 	return noopWaiter{}, nil
 }
 
-func (m *mockedConfig) Folder(id string) (config.FolderConfiguration, bool) {
+func (c *mockedConfig) Folder(id string) (config.FolderConfiguration, bool) {
 	return config.FolderConfiguration{}, false
 }
 
-func (m *mockedConfig) FolderList() []config.FolderConfiguration {
+func (c *mockedConfig) FolderList() []config.FolderConfiguration {
 	return nil
 }
 
-func (m *mockedConfig) SetFolder(fld config.FolderConfiguration) (config.Waiter, error) {
+func (c *mockedConfig) SetFolder(fld config.FolderConfiguration) (config.Waiter, error) {
 	return noopWaiter{}, nil
 }
 
-func (m *mockedConfig) Device(id protocol.DeviceID) (config.DeviceConfiguration, bool) {
+func (c *mockedConfig) Device(id protocol.DeviceID) (config.DeviceConfiguration, bool) {
 	return config.DeviceConfiguration{}, false
 }
 
-func (m *mockedConfig) RemoveDevice(id protocol.DeviceID) (config.Waiter, error) {
+func (c *mockedConfig) RemoveDevice(id protocol.DeviceID) (config.Waiter, error) {
 	return noopWaiter{}, nil
 }
 
-func (m *mockedConfig) IgnoredDevice(id protocol.DeviceID) bool {
+func (c *mockedConfig) IgnoredDevice(id protocol.DeviceID) bool {
 	return false
 }
 
-func (m *mockedConfig) IgnoredFolder(device protocol.DeviceID, folder string) bool {
+func (c *mockedConfig) IgnoredFolder(device protocol.DeviceID, folder string) bool {
 	return false
 }
 
-func (m *mockedConfig) GlobalDiscoveryServers() []string {
+func (c *mockedConfig) GlobalDiscoveryServers() []string {
+	return nil
+}
+
+func (c *mockedConfig) StunServers() []string {
 	return nil
 }
 

lib/api/mocked_connections_test.go

@@ -6,9 +6,17 @@
 
 package api
 
+import (
+	"github.com/syncthing/syncthing/lib/connections"
+)
+
 type mockedConnections struct{}
 
-func (m *mockedConnections) Status() map[string]interface{} {
+func (m *mockedConnections) ListenerStatus() map[string]connections.ListenerStatusEntry {
+	return nil
+}
+
+func (m *mockedConnections) ConnectionStatus() map[string]connections.ConnectionStatusEntry {
 	return nil
 }
 

lib/build/build.go

@@ -24,7 +24,7 @@ var (
 	Stamp   = "0"       // Set by build script
 
 	// Static
-	Codename = "Erbium Earthworm"
+	Codename = "Fermium Flea"
 
 	// Set by init()
 	Date        time.Time

lib/config/config.go

@@ -16,8 +16,6 @@ import (
 	"net"
 	"net/url"
 	"os"
-	"path"
-	"path/filepath"
 	"runtime"
 	"sort"
 	"strconv"
@@ -26,19 +24,20 @@ import (
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
-	"github.com/syncthing/syncthing/lib/upgrade"
 	"github.com/syncthing/syncthing/lib/util"
 )
 
 const (
 	OldestHandledVersion = 10
-	CurrentVersion       = 28
+	CurrentVersion       = 29
 	MaxRescanIntervalS   = 365 * 24 * 60 * 60
 )
 
 var (
 	// DefaultTCPPort defines default TCP port used if the URI does not specify one, for example tcp://0.0.0.0
 	DefaultTCPPort = 22000
+	// DefaultQUICPort defines default QUIC port used if the URI does not specify one, for example quic://0.0.0.0
+	DefaultQUICPort = 22000
 	// DefaultListenAddresses should be substituted when the configuration
 	// contains <listenAddress>default</listenAddress>. This is done by the
 	// "consumer" of the configuration as we don't want these saved to the
@@ -46,6 +45,7 @@ var (
 	DefaultListenAddresses = []string{
 		util.Address("tcp", net.JoinHostPort("0.0.0.0", strconv.Itoa(DefaultTCPPort))),
 		"dynamic+https://relays.syncthing.net/endpoint",
+		util.Address("quic", net.JoinHostPort("0.0.0.0", strconv.Itoa(DefaultQUICPort))),
 	}
 	DefaultGUIPort = 8384
 	// DefaultDiscoveryServersV4 should be substituted when the configuration
@@ -65,6 +65,30 @@ var (
 	DefaultDiscoveryServers = append(DefaultDiscoveryServersV4, DefaultDiscoveryServersV6...)
 	// DefaultTheme is the default and fallback theme for the web UI.
 	DefaultTheme = "default"
+	// Default stun servers should be substituted when the configuration
+	// contains <stunServer>default</stunServer>.
+
+	// DefaultPrimaryStunServers are servers provided by us (to avoid causing the public servers burden)
+	DefaultPrimaryStunServers = []string{
+		"stun.syncthing.net:3478",
+	}
+	DefaultSecondaryStunServers = []string{
+		"stun.callwithus.com:3478",
+		"stun.counterpath.com:3478",
+		"stun.counterpath.net:3478",
+		"stun.ekiga.net:3478",
+		"stun.ideasip.com:3478",
+		"stun.internetcalls.com:3478",
+		"stun.schlund.de:3478",
+		"stun.sipgate.net:10000",
+		"stun.sipgate.net:3478",
+		"stun.voip.aebc.com:3478",
+		"stun.voiparound.com:3478",
+		"stun.voipbuster.com:3478",
+		"stun.voipstunt.com:3478",
+		"stun.voxgratia.org:3478",
+		"stun.xten.com:3478",
+	}
 )
 
 func New(myID protocol.DeviceID) Configuration {
@@ -258,68 +282,15 @@ func (cfg *Configuration) clean() error {
 		existingFolders[folder.ID] = folder
 	}
 
-	cfg.Options.ListenAddresses = util.UniqueStrings(cfg.Options.ListenAddresses)
-	cfg.Options.GlobalAnnServers = util.UniqueStrings(cfg.Options.GlobalAnnServers)
+	cfg.Options.ListenAddresses = util.UniqueTrimmedStrings(cfg.Options.ListenAddresses)
+	cfg.Options.GlobalAnnServers = util.UniqueTrimmedStrings(cfg.Options.GlobalAnnServers)
 
 	if cfg.Version > 0 && cfg.Version < OldestHandledVersion {
 		l.Warnf("Configuration version %d is deprecated. Attempting best effort conversion, but please verify manually.", cfg.Version)
 	}
 
 	// Upgrade configuration versions as appropriate
-	if cfg.Version <= 10 {
-		convertV10V11(cfg)
-	}
-	if cfg.Version == 11 {
-		convertV11V12(cfg)
-	}
-	if cfg.Version == 12 {
-		convertV12V13(cfg)
-	}
-	if cfg.Version == 13 {
-		convertV13V14(cfg)
-	}
-	if cfg.Version == 14 {
-		convertV14V15(cfg)
-	}
-	if cfg.Version == 15 {
-		convertV15V16(cfg)
-	}
-	if cfg.Version == 16 {
-		convertV16V17(cfg)
-	}
-	if cfg.Version == 17 {
-		convertV17V18(cfg)
-	}
-	if cfg.Version == 18 {
-		convertV18V19(cfg)
-	}
-	if cfg.Version == 19 {
-		convertV19V20(cfg)
-	}
-	if cfg.Version == 20 {
-		convertV20V21(cfg)
-	}
-	if cfg.Version == 21 {
-		convertV21V22(cfg)
-	}
-	if cfg.Version == 22 {
-		convertV22V23(cfg)
-	}
-	if cfg.Version == 23 {
-		convertV23V24(cfg)
-	}
-	if cfg.Version == 24 {
-		convertV24V25(cfg)
-	}
-	if cfg.Version == 25 {
-		convertV25V26(cfg)
-	}
-	if cfg.Version == 26 {
-		convertV26V27(cfg)
-	}
-	if cfg.Version == 27 {
-		convertV27V28(cfg)
-	}
+	migrations.apply(cfg)
 
 	// Build a list of available devices
 	existingDevices := make(map[protocol.DeviceID]bool)
@@ -446,324 +417,6 @@ func (cfg *Configuration) DeviceMap() map[protocol.DeviceID]DeviceConfiguration
 	return m
 }
 
-func convertV27V28(cfg *Configuration) {
-	// Show a notification about enabling filesystem watching
-	cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "fsWatcherNotification")
-	cfg.Version = 28
-}
-
-func convertV26V27(cfg *Configuration) {
-	for i := range cfg.Folders {
-		f := &cfg.Folders[i]
-		if f.DeprecatedPullers != 0 {
-			f.PullerMaxPendingKiB = 128 * f.DeprecatedPullers
-			f.DeprecatedPullers = 0
-		}
-	}
-	cfg.Version = 27
-}
-
-func convertV25V26(cfg *Configuration) {
-	// triggers database update
-	cfg.Version = 26
-}
-
-func convertV24V25(cfg *Configuration) {
-	for i := range cfg.Folders {
-		cfg.Folders[i].FSWatcherDelayS = 10
-	}
-
-	cfg.Version = 25
-}
-
-func convertV23V24(cfg *Configuration) {
-	cfg.Options.URSeen = 2
-
-	cfg.Version = 24
-}
-
-func convertV22V23(cfg *Configuration) {
-	permBits := fs.FileMode(0777)
-	if runtime.GOOS == "windows" {
-		// Windows has no umask so we must chose a safer set of bits to
-		// begin with.
-		permBits = 0700
-	}
-
-	// Upgrade code remains hardcoded for .stfolder despite configurable
-	// marker name in later versions.
-
-	for i := range cfg.Folders {
-		fs := cfg.Folders[i].Filesystem()
-		// Invalid config posted, or tests.
-		if fs == nil {
-			continue
-		}
-		if stat, err := fs.Stat(DefaultMarkerName); err == nil && !stat.IsDir() {
-			err = fs.Remove(DefaultMarkerName)
-			if err == nil {
-				err = fs.Mkdir(DefaultMarkerName, permBits)
-				fs.Hide(DefaultMarkerName) // ignore error
-			}
-			if err != nil {
-				l.Infoln("Failed to upgrade folder marker:", err)
-			}
-		}
-	}
-
-	cfg.Version = 23
-}
-
-func convertV21V22(cfg *Configuration) {
-	for i := range cfg.Folders {
-		cfg.Folders[i].FilesystemType = fs.FilesystemTypeBasic
-		// Migrate to templated external versioner commands
-		if cfg.Folders[i].Versioning.Type == "external" {
-			cfg.Folders[i].Versioning.Params["command"] += " %FOLDER_PATH% %FILE_PATH%"
-		}
-	}
-
-	cfg.Version = 22
-}
-
-func convertV20V21(cfg *Configuration) {
-	for _, folder := range cfg.Folders {
-		if folder.FilesystemType != fs.FilesystemTypeBasic {
-			continue
-		}
-		switch folder.Versioning.Type {
-		case "simple", "trashcan":
-			// Clean out symlinks in the known place
-			cleanSymlinks(folder.Filesystem(), ".stversions")
-		case "staggered":
-			versionDir := folder.Versioning.Params["versionsPath"]
-			if versionDir == "" {
-				// default place
-				cleanSymlinks(folder.Filesystem(), ".stversions")
-			} else if filepath.IsAbs(versionDir) {
-				// absolute
-				cleanSymlinks(fs.NewFilesystem(fs.FilesystemTypeBasic, versionDir), ".")
-			} else {
-				// relative to folder
-				cleanSymlinks(folder.Filesystem(), versionDir)
-			}
-		}
-	}
-
-	cfg.Version = 21
-}
-
-func convertV19V20(cfg *Configuration) {
-	cfg.Options.MinHomeDiskFree = Size{Value: cfg.Options.DeprecatedMinHomeDiskFreePct, Unit: "%"}
-	cfg.Options.DeprecatedMinHomeDiskFreePct = 0
-
-	for i := range cfg.Folders {
-		cfg.Folders[i].MinDiskFree = Size{Value: cfg.Folders[i].DeprecatedMinDiskFreePct, Unit: "%"}
-		cfg.Folders[i].DeprecatedMinDiskFreePct = 0
-	}
-
-	cfg.Version = 20
-}
-
-func convertV18V19(cfg *Configuration) {
-	// Triggers a database tweak
-	cfg.Version = 19
-}
-
-func convertV17V18(cfg *Configuration) {
-	// Do channel selection for existing users. Those who have auto upgrades
-	// and usage reporting on default to the candidate channel. Others get
-	// stable.
-	if cfg.Options.URAccepted > 0 && cfg.Options.AutoUpgradeIntervalH > 0 {
-		cfg.Options.UpgradeToPreReleases = true
-	}
-
-	// Show a notification to explain what's going on, except if upgrades
-	// are disabled by compilation or environment variable in which case
-	// it's not relevant.
-	if !upgrade.DisabledByCompilation && os.Getenv("STNOUPGRADE") == "" {
-		cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "channelNotification")
-	}
-
-	cfg.Version = 18
-}
-
-func convertV16V17(cfg *Configuration) {
-	// Fsync = true removed
-
-	cfg.Version = 17
-}
-
-func convertV15V16(cfg *Configuration) {
-	// Triggers a database tweak
-	cfg.Version = 16
-}
-
-func convertV14V15(cfg *Configuration) {
-	// Undo v0.13.0 broken migration
-
-	for i, addr := range cfg.Options.GlobalAnnServers {
-		switch addr {
-		case "default-v4v2/":
-			cfg.Options.GlobalAnnServers[i] = "default-v4"
-		case "default-v6v2/":
-			cfg.Options.GlobalAnnServers[i] = "default-v6"
-		}
-	}
-
-	cfg.Version = 15
-}
-
-func convertV13V14(cfg *Configuration) {
-	// Not using the ignore cache is the new default. Disable it on existing
-	// configurations.
-	cfg.Options.CacheIgnoredFiles = false
-
-	// Migrate UPnP -> NAT options
-	cfg.Options.NATEnabled = cfg.Options.DeprecatedUPnPEnabled
-	cfg.Options.DeprecatedUPnPEnabled = false
-	cfg.Options.NATLeaseM = cfg.Options.DeprecatedUPnPLeaseM
-	cfg.Options.DeprecatedUPnPLeaseM = 0
-	cfg.Options.NATRenewalM = cfg.Options.DeprecatedUPnPRenewalM
-	cfg.Options.DeprecatedUPnPRenewalM = 0
-	cfg.Options.NATTimeoutS = cfg.Options.DeprecatedUPnPTimeoutS
-	cfg.Options.DeprecatedUPnPTimeoutS = 0
-
-	// Replace the default listen address "tcp://0.0.0.0:22000" with the
-	// string "default", but only if we also have the default relay pool
-	// among the relay servers as this is implied by the new "default"
-	// entry.
-	hasDefault := false
-	for _, raddr := range cfg.Options.DeprecatedRelayServers {
-		if raddr == "dynamic+https://relays.syncthing.net/endpoint" {
-			for i, addr := range cfg.Options.ListenAddresses {
-				if addr == "tcp://0.0.0.0:22000" {
-					cfg.Options.ListenAddresses[i] = "default"
-					hasDefault = true
-					break
-				}
-			}
-			break
-		}
-	}
-
-	// Copy relay addresses into listen addresses.
-	for _, addr := range cfg.Options.DeprecatedRelayServers {
-		if hasDefault && addr == "dynamic+https://relays.syncthing.net/endpoint" {
-			// Skip the default relay address if we already have the
-			// "default" entry in the list.
-			continue
-		}
-		if addr == "" {
-			continue
-		}
-		cfg.Options.ListenAddresses = append(cfg.Options.ListenAddresses, addr)
-	}
-
-	cfg.Options.DeprecatedRelayServers = nil
-
-	// For consistency
-	sort.Strings(cfg.Options.ListenAddresses)
-
-	var newAddrs []string
-	for _, addr := range cfg.Options.GlobalAnnServers {
-		uri, err := url.Parse(addr)
-		if err != nil {
-			// That's odd. Skip the broken address.
-			continue
-		}
-		if uri.Scheme == "https" {
-			uri.Path = path.Join(uri.Path, "v2") + "/"
-			addr = uri.String()
-		}
-
-		newAddrs = append(newAddrs, addr)
-	}
-	cfg.Options.GlobalAnnServers = newAddrs
-
-	for i, fcfg := range cfg.Folders {
-		if fcfg.DeprecatedReadOnly {
-			cfg.Folders[i].Type = FolderTypeSendOnly
-		} else {
-			cfg.Folders[i].Type = FolderTypeSendReceive
-		}
-		cfg.Folders[i].DeprecatedReadOnly = false
-	}
-	// v0.13-beta already had config version 13 but did not get the new URL
-	if cfg.Options.ReleasesURL == "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30" {
-		cfg.Options.ReleasesURL = "https://upgrades.syncthing.net/meta.json"
-	}
-
-	cfg.Version = 14
-}
-
-func convertV12V13(cfg *Configuration) {
-	if cfg.Options.ReleasesURL == "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30" {
-		cfg.Options.ReleasesURL = "https://upgrades.syncthing.net/meta.json"
-	}
-
-	cfg.Version = 13
-}
-
-func convertV11V12(cfg *Configuration) {
-	// Change listen address schema
-	for i, addr := range cfg.Options.ListenAddresses {
-		if len(addr) > 0 && !strings.HasPrefix(addr, "tcp://") {
-			cfg.Options.ListenAddresses[i] = util.Address("tcp", addr)
-		}
-	}
-
-	for i, device := range cfg.Devices {
-		for j, addr := range device.Addresses {
-			if addr != "dynamic" && addr != "" {
-				cfg.Devices[i].Addresses[j] = util.Address("tcp", addr)
-			}
-		}
-	}
-
-	// Use new discovery server
-	var newDiscoServers []string
-	var useDefault bool
-	for _, addr := range cfg.Options.GlobalAnnServers {
-		if addr == "udp4://announce.syncthing.net:22026" {
-			useDefault = true
-		} else if addr == "udp6://announce-v6.syncthing.net:22026" {
-			useDefault = true
-		} else {
-			newDiscoServers = append(newDiscoServers, addr)
-		}
-	}
-	if useDefault {
-		newDiscoServers = append(newDiscoServers, "default")
-	}
-	cfg.Options.GlobalAnnServers = newDiscoServers
-
-	// Use new multicast group
-	if cfg.Options.LocalAnnMCAddr == "[ff32::5222]:21026" {
-		cfg.Options.LocalAnnMCAddr = "[ff12::8384]:21027"
-	}
-
-	// Use new local discovery port
-	if cfg.Options.LocalAnnPort == 21025 {
-		cfg.Options.LocalAnnPort = 21027
-	}
-
-	// Set MaxConflicts to unlimited
-	for i := range cfg.Folders {
-		cfg.Folders[i].MaxConflicts = -1
-	}
-
-	cfg.Version = 12
-}
-
-func convertV10V11(cfg *Configuration) {
-	// Set minimum disk free of existing folders to 1%
-	for i := range cfg.Folders {
-		cfg.Folders[i].DeprecatedMinDiskFreePct = 1
-	}
-	cfg.Version = 11
-}
-
 func ensureDevicePresent(devices []FolderDeviceConfiguration, myID protocol.DeviceID) []FolderDeviceConfiguration {
 	for _, device := range devices {
 		if device.DeviceID.Equals(myID) {

lib/config/config_test.go

@@ -69,6 +69,11 @@ func TestDefaultValues(t *testing.T) {
 		UnackedNotificationIDs:  []string{},
 		DefaultFolderPath:       "~",
 		SetLowPriority:          true,
+		CRURL:                   "https://crash.syncthing.net/newcrash",
+		CREnabled:               true,
+		StunKeepaliveStartS:     180,
+		StunKeepaliveMinS:       20,
+		StunServers:             []string{"default"},
 	}
 
 	cfg := New(device1)
@@ -200,7 +205,8 @@ func TestOverriddenValues(t *testing.T) {
 		ProgressUpdateIntervalS: 10,
 		LimitBandwidthInLan:     true,
 		MinHomeDiskFree:         Size{5.2, "%"},
-		URSeen:                  2,
+		URSeen:                  8,
+		URAccepted:              4,
 		URURL:                   "https://localhost/newdata",
 		URInitialDelayS:         800,
 		URPostInsecurely:        true,
@@ -208,12 +214,14 @@ func TestOverriddenValues(t *testing.T) {
 		AlwaysLocalNets:         []string{},
 		OverwriteRemoteDevNames: true,
 		TempIndexMinBlocks:      100,
-		UnackedNotificationIDs: []string{
-			"channelNotification",   // added in 17->18 migration
-			"fsWatcherNotification", // added in 27->28 migration
-		},
-		DefaultFolderPath: "/media/syncthing",
-		SetLowPriority:    false,
+		UnackedNotificationIDs:  []string{"asdfasdf"},
+		DefaultFolderPath:       "/media/syncthing",
+		SetLowPriority:          false,
+		CRURL:                   "https://localhost/newcrash",
+		CREnabled:               false,
+		StunKeepaliveStartS:     9000,
+		StunKeepaliveMinS:       900,
+		StunServers:             []string{"foo"},
 	}
 
 	os.Unsetenv("STNOUPGRADE")
@@ -760,6 +768,8 @@ func TestV14ListenAddressesMigration(t *testing.T) {
 		},
 	}
 
+	m := migration{14, migrateToConfigV14}
+
 	for _, tc := range tcs {
 		cfg := Configuration{
 			Version: 13,
@@ -768,7 +778,7 @@ func TestV14ListenAddressesMigration(t *testing.T) {
 				DeprecatedRelayServers: tc[1],
 			},
 		}
-		convertV13V14(&cfg)
+		m.apply(&cfg)
 		if cfg.Version != 14 {
 			t.Error("Configuration was not converted")
 		}

lib/config/folderconfiguration.go

@@ -52,7 +52,6 @@ type FolderConfiguration struct {
 	Paused                  bool                        `xml:"paused" json:"paused"`
 	WeakHashThresholdPct    int                         `xml:"weakHashThresholdPct" json:"weakHashThresholdPct"` // Use weak hash if more than X percent of the file has changed. Set to -1 to always use weak hash.
 	MarkerName              string                      `xml:"markerName" json:"markerName"`
-	UseLargeBlocks          bool                        `xml:"useLargeBlocks" json:"useLargeBlocks" default:"true"`
 	CopyOwnershipFromParent bool                        `xml:"copyOwnershipFromParent" json:"copyOwnershipFromParent"`
 
 	cachedFilesystem fs.Filesystem

lib/config/migrations.go

@@ -0,0 +1,370 @@
+// 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 config
+
+import (
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"runtime"
+	"sort"
+	"strings"
+
+	"github.com/syncthing/syncthing/lib/fs"
+	"github.com/syncthing/syncthing/lib/upgrade"
+	"github.com/syncthing/syncthing/lib/util"
+)
+
+// migrations is the set of config migration functions, with their target
+// config version. The conversion function can be nil in which case we just
+// update the config version. The order of migrations doesn't matter here,
+// put the newest on top for readability.
+var migrations = migrationSet{
+	{29, migrateToConfigV29},
+	{28, migrateToConfigV28},
+	{27, migrateToConfigV27},
+	{26, nil}, // triggers database update
+	{25, migrateToConfigV25},
+	{24, migrateToConfigV24},
+	{23, migrateToConfigV23},
+	{22, migrateToConfigV22},
+	{21, migrateToConfigV21},
+	{20, migrateToConfigV20},
+	{19, nil}, // Triggers a database tweak
+	{18, migrateToConfigV18},
+	{17, nil}, // Fsync = true removed
+	{16, nil}, // Triggers a database tweak
+	{15, migrateToConfigV15},
+	{14, migrateToConfigV14},
+	{13, migrateToConfigV13},
+	{12, migrateToConfigV12},
+	{11, migrateToConfigV11},
+}
+
+type migrationSet []migration
+
+// apply applies all the migrations in the set, as required by the current
+// version and target version, in the correct order.
+func (ms migrationSet) apply(cfg *Configuration) {
+	// Make sure we apply the migrations in target version order regardless
+	// of how it was defined.
+	sort.Slice(ms, func(a, b int) bool {
+		return ms[a].targetVersion < ms[b].targetVersion
+	})
+
+	// Apply all migrations.
+	for _, m := range ms {
+		m.apply(cfg)
+	}
+}
+
+// A migration is a target config version and a function to do the needful
+// to reach that version. The function does not need to change the actual
+// cfg.Version field.
+type migration struct {
+	targetVersion int
+	convert       func(cfg *Configuration)
+}
+
+// apply applies the conversion function if the current version is below the
+// target version and the function is not nil, and updates the current
+// version.
+func (m migration) apply(cfg *Configuration) {
+	if cfg.Version >= m.targetVersion {
+		return
+	}
+	if m.convert != nil {
+		m.convert(cfg)
+	}
+	cfg.Version = m.targetVersion
+}
+
+func migrateToConfigV29(cfg *Configuration) {
+	// The new crash reporting option should follow the state of global
+	// discovery / usage reporting, and we should display an appropriate
+	// notification.
+	if cfg.Options.GlobalAnnEnabled || cfg.Options.URAccepted > 0 {
+		cfg.Options.CREnabled = true
+		cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "crAutoEnabled")
+	} else {
+		cfg.Options.CREnabled = false
+		cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "crAutoDisabled")
+	}
+}
+
+func migrateToConfigV28(cfg *Configuration) {
+	// Show a notification about enabling filesystem watching
+	cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "fsWatcherNotification")
+}
+
+func migrateToConfigV27(cfg *Configuration) {
+	for i := range cfg.Folders {
+		f := &cfg.Folders[i]
+		if f.DeprecatedPullers != 0 {
+			f.PullerMaxPendingKiB = 128 * f.DeprecatedPullers
+			f.DeprecatedPullers = 0
+		}
+	}
+}
+
+func migrateToConfigV25(cfg *Configuration) {
+	for i := range cfg.Folders {
+		cfg.Folders[i].FSWatcherDelayS = 10
+	}
+}
+
+func migrateToConfigV24(cfg *Configuration) {
+	cfg.Options.URSeen = 2
+}
+
+func migrateToConfigV23(cfg *Configuration) {
+	permBits := fs.FileMode(0777)
+	if runtime.GOOS == "windows" {
+		// Windows has no umask so we must chose a safer set of bits to
+		// begin with.
+		permBits = 0700
+	}
+
+	// Upgrade code remains hardcoded for .stfolder despite configurable
+	// marker name in later versions.
+
+	for i := range cfg.Folders {
+		fs := cfg.Folders[i].Filesystem()
+		// Invalid config posted, or tests.
+		if fs == nil {
+			continue
+		}
+		if stat, err := fs.Stat(DefaultMarkerName); err == nil && !stat.IsDir() {
+			err = fs.Remove(DefaultMarkerName)
+			if err == nil {
+				err = fs.Mkdir(DefaultMarkerName, permBits)
+				fs.Hide(DefaultMarkerName) // ignore error
+			}
+			if err != nil {
+				l.Infoln("Failed to upgrade folder marker:", err)
+			}
+		}
+	}
+}
+
+func migrateToConfigV22(cfg *Configuration) {
+	for i := range cfg.Folders {
+		cfg.Folders[i].FilesystemType = fs.FilesystemTypeBasic
+		// Migrate to templated external versioner commands
+		if cfg.Folders[i].Versioning.Type == "external" {
+			cfg.Folders[i].Versioning.Params["command"] += " %FOLDER_PATH% %FILE_PATH%"
+		}
+	}
+}
+
+func migrateToConfigV21(cfg *Configuration) {
+	for _, folder := range cfg.Folders {
+		if folder.FilesystemType != fs.FilesystemTypeBasic {
+			continue
+		}
+		switch folder.Versioning.Type {
+		case "simple", "trashcan":
+			// Clean out symlinks in the known place
+			cleanSymlinks(folder.Filesystem(), ".stversions")
+		case "staggered":
+			versionDir := folder.Versioning.Params["versionsPath"]
+			if versionDir == "" {
+				// default place
+				cleanSymlinks(folder.Filesystem(), ".stversions")
+			} else if filepath.IsAbs(versionDir) {
+				// absolute
+				cleanSymlinks(fs.NewFilesystem(fs.FilesystemTypeBasic, versionDir), ".")
+			} else {
+				// relative to folder
+				cleanSymlinks(folder.Filesystem(), versionDir)
+			}
+		}
+	}
+}
+
+func migrateToConfigV20(cfg *Configuration) {
+	cfg.Options.MinHomeDiskFree = Size{Value: cfg.Options.DeprecatedMinHomeDiskFreePct, Unit: "%"}
+	cfg.Options.DeprecatedMinHomeDiskFreePct = 0
+
+	for i := range cfg.Folders {
+		cfg.Folders[i].MinDiskFree = Size{Value: cfg.Folders[i].DeprecatedMinDiskFreePct, Unit: "%"}
+		cfg.Folders[i].DeprecatedMinDiskFreePct = 0
+	}
+}
+
+func migrateToConfigV18(cfg *Configuration) {
+	// Do channel selection for existing users. Those who have auto upgrades
+	// and usage reporting on default to the candidate channel. Others get
+	// stable.
+	if cfg.Options.URAccepted > 0 && cfg.Options.AutoUpgradeIntervalH > 0 {
+		cfg.Options.UpgradeToPreReleases = true
+	}
+
+	// Show a notification to explain what's going on, except if upgrades
+	// are disabled by compilation or environment variable in which case
+	// it's not relevant.
+	if !upgrade.DisabledByCompilation && os.Getenv("STNOUPGRADE") == "" {
+		cfg.Options.UnackedNotificationIDs = append(cfg.Options.UnackedNotificationIDs, "channelNotification")
+	}
+}
+
+func migrateToConfigV15(cfg *Configuration) {
+	// Undo v0.13.0 broken migration
+
+	for i, addr := range cfg.Options.GlobalAnnServers {
+		switch addr {
+		case "default-v4v2/":
+			cfg.Options.GlobalAnnServers[i] = "default-v4"
+		case "default-v6v2/":
+			cfg.Options.GlobalAnnServers[i] = "default-v6"
+		}
+	}
+}
+
+func migrateToConfigV14(cfg *Configuration) {
+	// Not using the ignore cache is the new default. Disable it on existing
+	// configurations.
+	cfg.Options.CacheIgnoredFiles = false
+
+	// Migrate UPnP -> NAT options
+	cfg.Options.NATEnabled = cfg.Options.DeprecatedUPnPEnabled
+	cfg.Options.DeprecatedUPnPEnabled = false
+	cfg.Options.NATLeaseM = cfg.Options.DeprecatedUPnPLeaseM
+	cfg.Options.DeprecatedUPnPLeaseM = 0
+	cfg.Options.NATRenewalM = cfg.Options.DeprecatedUPnPRenewalM
+	cfg.Options.DeprecatedUPnPRenewalM = 0
+	cfg.Options.NATTimeoutS = cfg.Options.DeprecatedUPnPTimeoutS
+	cfg.Options.DeprecatedUPnPTimeoutS = 0
+
+	// Replace the default listen address "tcp://0.0.0.0:22000" with the
+	// string "default", but only if we also have the default relay pool
+	// among the relay servers as this is implied by the new "default"
+	// entry.
+	hasDefault := false
+	for _, raddr := range cfg.Options.DeprecatedRelayServers {
+		if raddr == "dynamic+https://relays.syncthing.net/endpoint" {
+			for i, addr := range cfg.Options.ListenAddresses {
+				if addr == "tcp://0.0.0.0:22000" {
+					cfg.Options.ListenAddresses[i] = "default"
+					hasDefault = true
+					break
+				}
+			}
+			break
+		}
+	}
+
+	// Copy relay addresses into listen addresses.
+	for _, addr := range cfg.Options.DeprecatedRelayServers {
+		if hasDefault && addr == "dynamic+https://relays.syncthing.net/endpoint" {
+			// Skip the default relay address if we already have the
+			// "default" entry in the list.
+			continue
+		}
+		if addr == "" {
+			continue
+		}
+		cfg.Options.ListenAddresses = append(cfg.Options.ListenAddresses, addr)
+	}
+
+	cfg.Options.DeprecatedRelayServers = nil
+
+	// For consistency
+	sort.Strings(cfg.Options.ListenAddresses)
+
+	var newAddrs []string
+	for _, addr := range cfg.Options.GlobalAnnServers {
+		uri, err := url.Parse(addr)
+		if err != nil {
+			// That's odd. Skip the broken address.
+			continue
+		}
+		if uri.Scheme == "https" {
+			uri.Path = path.Join(uri.Path, "v2") + "/"
+			addr = uri.String()
+		}
+
+		newAddrs = append(newAddrs, addr)
+	}
+	cfg.Options.GlobalAnnServers = newAddrs
+
+	for i, fcfg := range cfg.Folders {
+		if fcfg.DeprecatedReadOnly {
+			cfg.Folders[i].Type = FolderTypeSendOnly
+		} else {
+			cfg.Folders[i].Type = FolderTypeSendReceive
+		}
+		cfg.Folders[i].DeprecatedReadOnly = false
+	}
+	// v0.13-beta already had config version 13 but did not get the new URL
+	if cfg.Options.ReleasesURL == "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30" {
+		cfg.Options.ReleasesURL = "https://upgrades.syncthing.net/meta.json"
+	}
+}
+
+func migrateToConfigV13(cfg *Configuration) {
+	if cfg.Options.ReleasesURL == "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30" {
+		cfg.Options.ReleasesURL = "https://upgrades.syncthing.net/meta.json"
+	}
+}
+
+func migrateToConfigV12(cfg *Configuration) {
+	// Change listen address schema
+	for i, addr := range cfg.Options.ListenAddresses {
+		if len(addr) > 0 && !strings.HasPrefix(addr, "tcp://") {
+			cfg.Options.ListenAddresses[i] = util.Address("tcp", addr)
+		}
+	}
+
+	for i, device := range cfg.Devices {
+		for j, addr := range device.Addresses {
+			if addr != "dynamic" && addr != "" {
+				cfg.Devices[i].Addresses[j] = util.Address("tcp", addr)
+			}
+		}
+	}
+
+	// Use new discovery server
+	var newDiscoServers []string
+	var useDefault bool
+	for _, addr := range cfg.Options.GlobalAnnServers {
+		if addr == "udp4://announce.syncthing.net:22026" {
+			useDefault = true
+		} else if addr == "udp6://announce-v6.syncthing.net:22026" {
+			useDefault = true
+		} else {
+			newDiscoServers = append(newDiscoServers, addr)
+		}
+	}
+	if useDefault {
+		newDiscoServers = append(newDiscoServers, "default")
+	}
+	cfg.Options.GlobalAnnServers = newDiscoServers
+
+	// Use new multicast group
+	if cfg.Options.LocalAnnMCAddr == "[ff32::5222]:21026" {
+		cfg.Options.LocalAnnMCAddr = "[ff12::8384]:21027"
+	}
+
+	// Use new local discovery port
+	if cfg.Options.LocalAnnPort == 21025 {
+		cfg.Options.LocalAnnPort = 21027
+	}
+
+	// Set MaxConflicts to unlimited
+	for i := range cfg.Folders {
+		cfg.Folders[i].MaxConflicts = -1
+	}
+}
+
+func migrateToConfigV11(cfg *Configuration) {
+	// Set minimum disk free of existing folders to 1%
+	for i := range cfg.Folders {
+		cfg.Folders[i].DeprecatedMinDiskFreePct = 1
+	}
+}

lib/config/migrations_test.go

@@ -0,0 +1,34 @@
+// 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 config
+
+import "testing"
+
+func TestMigrateCrashReporting(t *testing.T) {
+	// When migrating from pre-crash-reporting configs, crash reporting is
+	// enabled if global discovery is enabled or if usage reporting is
+	// enabled (not just undecided).
+	cases := []struct {
+		opts    OptionsConfiguration
+		enabled bool
+	}{
+		{opts: OptionsConfiguration{URAccepted: 0, GlobalAnnEnabled: true}, enabled: true},
+		{opts: OptionsConfiguration{URAccepted: -1, GlobalAnnEnabled: true}, enabled: true},
+		{opts: OptionsConfiguration{URAccepted: 1, GlobalAnnEnabled: true}, enabled: true},
+		{opts: OptionsConfiguration{URAccepted: 0, GlobalAnnEnabled: false}, enabled: false},
+		{opts: OptionsConfiguration{URAccepted: -1, GlobalAnnEnabled: false}, enabled: false},
+		{opts: OptionsConfiguration{URAccepted: 1, GlobalAnnEnabled: false}, enabled: true},
+	}
+
+	for i, tc := range cases {
+		cfg := Configuration{Version: 28, Options: tc.opts}
+		migrations.apply(&cfg)
+		if cfg.Options.CREnabled != tc.enabled {
+			t.Errorf("%d: unexpected result, CREnabled: %v != %v", i, cfg.Options.CREnabled, tc.enabled)
+		}
+	}
+}

lib/config/optionsconfiguration.go

@@ -29,11 +29,11 @@ type OptionsConfiguration struct {
 	NATLeaseM               int      `xml:"natLeaseMinutes" json:"natLeaseMinutes" default:"60"`
 	NATRenewalM             int      `xml:"natRenewalMinutes" json:"natRenewalMinutes" default:"30"`
 	NATTimeoutS             int      `xml:"natTimeoutSeconds" json:"natTimeoutSeconds" default:"10"`
-	URAccepted              int      `xml:"urAccepted" json:"urAccepted"` // Accepted usage reporting version; 0 for off (undecided), -1 for off (permanently)
-	URSeen                  int      `xml:"urSeen" json:"urSeen"`         // Report which the user has been prompted for.
-	URUniqueID              string   `xml:"urUniqueID" json:"urUniqueId"` // Unique ID for reporting purposes, regenerated when UR is turned on.
-	URURL                   string   `xml:"urURL" json:"urURL" default:"https://data.syncthing.net/newdata"`
-	URPostInsecurely        bool     `xml:"urPostInsecurely" json:"urPostInsecurely" default:"false"` // For testing
+	URAccepted              int      `xml:"urAccepted" json:"urAccepted"`                                    // Accepted usage reporting version; 0 for off (undecided), -1 for off (permanently)
+	URSeen                  int      `xml:"urSeen" json:"urSeen"`                                            // Report which the user has been prompted for.
+	URUniqueID              string   `xml:"urUniqueID" json:"urUniqueId"`                                    // Unique ID for reporting purposes, regenerated when UR is turned on.
+	URURL                   string   `xml:"urURL" json:"urURL" default:"https://data.syncthing.net/newdata"` // usage reporting URL
+	URPostInsecurely        bool     `xml:"urPostInsecurely" json:"urPostInsecurely" default:"false"`        // For testing
 	URInitialDelayS         int      `xml:"urInitialDelayS" json:"urInitialDelayS" default:"1800"`
 	RestartOnWakeup         bool     `xml:"restartOnWakeup" json:"restartOnWakeup" default:"true" restart:"true"`
 	AutoUpgradeIntervalH    int      `xml:"autoUpgradeIntervalH" json:"autoUpgradeIntervalH" default:"12" restart:"true"` // 0 for off
@@ -52,6 +52,11 @@ type OptionsConfiguration struct {
 	DefaultFolderPath       string   `xml:"defaultFolderPath" json:"defaultFolderPath" default:"~"`
 	SetLowPriority          bool     `xml:"setLowPriority" json:"setLowPriority" default:"true"`
 	MaxConcurrentScans      int      `xml:"maxConcurrentScans" json:"maxConcurrentScans"`
+	CRURL                   string   `xml:"crashReportingURL" json:"crURL" default:"https://crash.syncthing.net/newcrash"` // crash reporting URL
+	CREnabled               bool     `xml:"crashReportingEnabled" json:"crashReportingEnabled" default:"true" restart:"true"`
+	StunKeepaliveStartS     int      `xml:"stunKeepaliveStartS" json:"stunKeepaliveStartS" default:"180"` // 0 for off
+	StunKeepaliveMinS       int      `xml:"stunKeepaliveMinS" json:"stunKeepaliveMinS" default:"20"`      // 0 for off
+	StunServers             []string `xml:"stunServer" json:"stunServers" default:"default"`
 
 	DeprecatedUPnPEnabled        bool     `xml:"upnpEnabled,omitempty" json:"-"`
 	DeprecatedUPnPLeaseM         int      `xml:"upnpLeaseMinutes,omitempty" json:"-"`
@@ -61,29 +66,33 @@ type OptionsConfiguration struct {
 	DeprecatedMinHomeDiskFreePct float64  `xml:"minHomeDiskFreePct,omitempty" json:"-"`
 }
 
-func (orig OptionsConfiguration) Copy() OptionsConfiguration {
-	c := orig
-	c.ListenAddresses = make([]string, len(orig.ListenAddresses))
-	copy(c.ListenAddresses, orig.ListenAddresses)
-	c.GlobalAnnServers = make([]string, len(orig.GlobalAnnServers))
-	copy(c.GlobalAnnServers, orig.GlobalAnnServers)
-	c.AlwaysLocalNets = make([]string, len(orig.AlwaysLocalNets))
-	copy(c.AlwaysLocalNets, orig.AlwaysLocalNets)
-	c.UnackedNotificationIDs = make([]string, len(orig.UnackedNotificationIDs))
-	copy(c.UnackedNotificationIDs, orig.UnackedNotificationIDs)
-	return c
+func (opts OptionsConfiguration) Copy() OptionsConfiguration {
+	optsCopy := opts
+	optsCopy.ListenAddresses = make([]string, len(opts.ListenAddresses))
+	copy(optsCopy.ListenAddresses, opts.ListenAddresses)
+	optsCopy.GlobalAnnServers = make([]string, len(opts.GlobalAnnServers))
+	copy(optsCopy.GlobalAnnServers, opts.GlobalAnnServers)
+	optsCopy.AlwaysLocalNets = make([]string, len(opts.AlwaysLocalNets))
+	copy(optsCopy.AlwaysLocalNets, opts.AlwaysLocalNets)
+	optsCopy.UnackedNotificationIDs = make([]string, len(opts.UnackedNotificationIDs))
+	copy(optsCopy.UnackedNotificationIDs, opts.UnackedNotificationIDs)
+	return optsCopy
 }
 
 // RequiresRestartOnly returns a copy with only the attributes that require
 // restart on change.
-func (orig OptionsConfiguration) RequiresRestartOnly() OptionsConfiguration {
-	copy := orig
+func (opts OptionsConfiguration) RequiresRestartOnly() OptionsConfiguration {
+	optsCopy := opts
 	blank := OptionsConfiguration{}
-	util.CopyMatchingTag(&blank, &copy, "restart", func(v string) bool {
+	util.CopyMatchingTag(&blank, &optsCopy, "restart", func(v string) bool {
 		if len(v) > 0 && v != "true" {
-			panic(fmt.Sprintf(`unexpected tag value: %s. expected untagged or "true"`, v))
+			panic(fmt.Sprintf(`unexpected tag value: %s. Expected untagged or "true"`, v))
 		}
 		return v != "true"
 	})
-	return copy
+	return optsCopy
+}
+
+func (opts OptionsConfiguration) IsStunDisabled() bool {
+	return opts.StunKeepaliveMinS < 1 || opts.StunKeepaliveStartS < 1 || !opts.NATEnabled
 }

lib/config/testdata/overridenvalues.xml

@@ -1,4 +1,4 @@
-<configuration version="14">
+<configuration version="29">
     <options>
         <listenAddress>tcp://:23000</listenAddress>
         <allowDelete>false</allowDelete>
@@ -27,8 +27,10 @@
         <symlinksEnabled>false</symlinksEnabled>
         <limitBandwidthInLan>true</limitBandwidthInLan>
         <databaseBlockCacheMiB>42</databaseBlockCacheMiB>
-        <minHomeDiskFreePct>5.2</minHomeDiskFreePct>
+        <minHomeDiskFree unit="%">5.2</minHomeDiskFree>
         <urURL>https://localhost/newdata</urURL>
+        <urSeen>8</urSeen>
+        <urAccepted>4</urAccepted>
         <urInitialDelayS>800</urInitialDelayS>
         <urPostInsecurely>true</urPostInsecurely>
         <releasesURL>https://localhost/releases</releasesURL>
@@ -36,5 +38,11 @@
         <tempIndexMinBlocks>100</tempIndexMinBlocks>
         <defaultFolderPath>/media/syncthing</defaultFolderPath>
         <setLowPriority>false</setLowPriority>
+        <crashReportingURL>https://localhost/newcrash</crashReportingURL>
+        <crashReportingEnabled>false</crashReportingEnabled>
+        <stunKeepaliveStartS>9000</stunKeepaliveStartS>
+        <stunKeepaliveMinS>900</stunKeepaliveMinS>
+        <stunServer>foo</stunServer>
+        <unackedNotificationID>asdfasdf</unackedNotificationID>
     </options>
 </configuration>

lib/config/testdata/v29.xml

@@ -0,0 +1,16 @@
+<configuration version="28">
+    <folder id="test" path="testdata" type="readonly" ignorePerms="false" rescanIntervalS="600" fsWatcherEnabled="false" fsWatcherDelayS="10" autoNormalize="true">
+        <filesystemType>basic</filesystemType>
+        <device id="AIR6LPZ-7K4PTTV-UXQSMUU-CPQ5YWH-OEDFIIQ-JUG777G-2YQXXR5-YD6AWQR"></device>
+        <device id="P56IOI7-MZJNU2Y-IQGDREY-DM2MGTI-MGL3BXN-PQ6W5BM-TBBZ4TJ-XZWICQ2"></device>
+        <minDiskFree unit="%">1</minDiskFree>
+        <maxConflicts>-1</maxConflicts>
+        <fsync>true</fsync>
+    </folder>
+    <device id="AIR6LPZ-7K4PTTV-UXQSMUU-CPQ5YWH-OEDFIIQ-JUG777G-2YQXXR5-YD6AWQR" name="node one" compression="metadata">
+        <address>tcp://a</address>
+    </device>
+    <device id="P56IOI7-MZJNU2Y-IQGDREY-DM2MGTI-MGL3BXN-PQ6W5BM-TBBZ4TJ-XZWICQ2" name="node two" compression="metadata">
+        <address>tcp://b</address>
+    </device>
+</configuration>

lib/config/wrapper.go

@@ -14,6 +14,7 @@ import (
 	"github.com/syncthing/syncthing/lib/events"
 	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/protocol"
+	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/util"
 )
@@ -88,6 +89,7 @@ type Wrapper interface {
 
 	ListenAddresses() []string
 	GlobalDiscoveryServers() []string
+	StunServers() []string
 
 	Subscribe(c Committer)
 	Unsubscribe(c Committer)
@@ -105,6 +107,30 @@ type wrapper struct {
 	requiresRestart uint32 // an atomic bool
 }
 
+func (w *wrapper) StunServers() []string {
+	var addresses []string
+	for _, addr := range w.cfg.Options.StunServers {
+		switch addr {
+		case "default":
+			defaultPrimaryAddresses := make([]string, len(DefaultPrimaryStunServers))
+			copy(defaultPrimaryAddresses, DefaultPrimaryStunServers)
+			rand.Shuffle(defaultPrimaryAddresses)
+			addresses = append(addresses, defaultPrimaryAddresses...)
+
+			defaultSecondaryAddresses := make([]string, len(DefaultSecondaryStunServers))
+			copy(defaultSecondaryAddresses, DefaultSecondaryStunServers)
+			rand.Shuffle(defaultSecondaryAddresses)
+			addresses = append(addresses, defaultSecondaryAddresses...)
+		default:
+			addresses = append(addresses, addr)
+		}
+	}
+
+	addresses = util.UniqueTrimmedStrings(addresses)
+
+	return addresses
+}
+
 // Wrap wraps an existing Configuration structure and ties it to a file on
 // disk.
 func Wrap(path string, cfg Configuration) Wrapper {
@@ -442,7 +468,7 @@ func (w *wrapper) GlobalDiscoveryServers() []string {
 			servers = append(servers, srv)
 		}
 	}
-	return util.UniqueStrings(servers)
+	return util.UniqueTrimmedStrings(servers)
 }
 
 func (w *wrapper) ListenAddresses() []string {
@@ -455,7 +481,7 @@ func (w *wrapper) ListenAddresses() []string {
 			addresses = append(addresses, addr)
 		}
 	}
-	return util.UniqueStrings(addresses)
+	return util.UniqueTrimmedStrings(addresses)
 }
 
 func (w *wrapper) RequiresRestart() bool {

lib/connections/config.go

@@ -1,12 +0,0 @@
-// Copyright (C) 2017 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 http://mozilla.org/MPL/2.0/.
-
-package connections
-
-const (
-	tcpPriority   = 10
-	relayPriority = 200
-)

lib/connections/quic_dial.go

@@ -0,0 +1,131 @@
+// 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/.
+
+// +build go1.12
+
+package connections
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+	"net/url"
+	"time"
+
+	"github.com/lucas-clemente/quic-go"
+
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/connections/registry"
+	"github.com/syncthing/syncthing/lib/protocol"
+)
+
+const quicPriority = 100
+
+func init() {
+	factory := &quicDialerFactory{}
+	for _, scheme := range []string{"quic", "quic4", "quic6"} {
+		dialers[scheme] = factory
+	}
+}
+
+type quicDialer struct {
+	cfg    config.Wrapper
+	tlsCfg *tls.Config
+}
+
+func (d *quicDialer) Dial(id protocol.DeviceID, uri *url.URL) (internalConn, error) {
+	uri = fixupPort(uri, config.DefaultQUICPort)
+
+	addr, err := net.ResolveUDPAddr("udp", uri.Host)
+	if err != nil {
+		return internalConn{}, err
+	}
+
+	var conn net.PacketConn
+	// We need to track who created the conn.
+	// Given we always pass the connection to quic, it assumes it's a remote connection it never closes it,
+	// So our wrapper around it needs to close it, but it only needs to close it if it's not the listening connection.
+	var createdConn net.PacketConn
+	if listenConn := registry.Get(uri.Scheme, packetConnLess); listenConn != nil {
+		conn = listenConn.(net.PacketConn)
+	} else {
+		if packetConn, err := net.ListenPacket("udp", ":0"); err != nil {
+			return internalConn{}, err
+		} else {
+			conn = packetConn
+			createdConn = packetConn
+		}
+	}
+
+	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+	session, err := quic.DialContext(ctx, conn, addr, uri.Host, d.tlsCfg, quicConfig)
+	if err != nil {
+		if createdConn != nil {
+			_ = createdConn.Close()
+		}
+		return internalConn{}, err
+	}
+
+	// OpenStreamSync is blocks, but we want to make sure the connection is usable
+	// before we start killing off other connections, so do the dance.
+	ok := make(chan struct{})
+	go func() {
+		select {
+		case <-ok:
+			return
+		case <-time.After(10 * time.Second):
+			l.Debugln("timed out waiting for OpenStream on", session.RemoteAddr())
+			// This will unblock OpenStreamSync
+			_ = session.Close()
+		}
+	}()
+
+	stream, err := session.OpenStreamSync()
+	close(ok)
+	if err != nil {
+		// It's ok to close these, this does not close the underlying packetConn.
+		_ = session.Close()
+		if createdConn != nil {
+			_ = createdConn.Close()
+		}
+		return internalConn{}, err
+	}
+
+	return internalConn{&quicTlsConn{session, stream, createdConn}, connTypeQUICClient, quicPriority}, nil
+}
+
+func (d *quicDialer) RedialFrequency() time.Duration {
+	return time.Duration(d.cfg.Options().ReconnectIntervalS) * time.Second
+}
+
+type quicDialerFactory struct {
+	cfg    config.Wrapper
+	tlsCfg *tls.Config
+}
+
+func (quicDialerFactory) New(cfg config.Wrapper, tlsCfg *tls.Config) genericDialer {
+	return &quicDialer{
+		cfg:    cfg,
+		tlsCfg: tlsCfg,
+	}
+}
+
+func (quicDialerFactory) Priority() int {
+	return quicPriority
+}
+
+func (quicDialerFactory) AlwaysWAN() bool {
+	return false
+}
+
+func (quicDialerFactory) Valid(_ config.Configuration) error {
+	// Always valid
+	return nil
+}
+
+func (quicDialerFactory) String() string {
+	return "QUIC Dialer"
+}

lib/connections/quic_listen.go

@@ -0,0 +1,239 @@
+// 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 http://mozilla.org/MPL/2.0/.
+
+// +build go1.12
+
+package connections
+
+import (
+	"crypto/tls"
+	"net"
+	"net/url"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/lucas-clemente/quic-go"
+
+	"github.com/syncthing/syncthing/lib/config"
+	"github.com/syncthing/syncthing/lib/connections/registry"
+	"github.com/syncthing/syncthing/lib/nat"
+	"github.com/syncthing/syncthing/lib/stun"
+)
+
+func init() {
+	factory := &quicListenerFactory{}
+	for _, scheme := range []string{"quic", "quic4", "quic6"} {
+		listeners[scheme] = factory
+	}
+}
+
+type quicListener struct {
+	nat atomic.Value
+
+	onAddressesChangedNotifier
+
+	uri     *url.URL
+	cfg     config.Wrapper
+	tlsCfg  *tls.Config
+	stop    chan struct{}
+	conns   chan internalConn
+	factory listenerFactory
+
+	address *url.URL
+	err     error
+	mut     sync.Mutex
+}
+
+func (t *quicListener) OnNATTypeChanged(natType stun.NATType) {
+	if natType != stun.NATUnknown {
+		l.Infof("%s detected NAT type: %s", t.uri, natType)
+	}
+	t.nat.Store(natType)
+}
+
+func (t *quicListener) OnExternalAddressChanged(address *stun.Host, via string) {
+	var uri *url.URL
+	if address != nil {
+		copy := *t.uri
+		uri = &copy
+		uri.Host = address.TransportAddr()
+	}
+
+	t.mut.Lock()
+	existingAddress := t.address
+	t.address = uri
+	t.mut.Unlock()
+
+	if uri != nil && (existingAddress == nil || existingAddress.String() != uri.String()) {
+		l.Infof("%s resolved external address %s (via %s)", t.uri, uri.String(), via)
+		t.notifyAddressesChanged(t)
+	} else if uri == nil && existingAddress != nil {
+		t.notifyAddressesChanged(t)
+	}
+}
+
+func (t *quicListener) Serve() {
+	t.mut.Lock()
+	t.err = nil
+	t.mut.Unlock()
+
+	network := strings.Replace(t.uri.Scheme, "quic", "udp", -1)
+
+	packetConn, err := net.ListenPacket(network, t.uri.Host)
+	if err != nil {
+		t.mut.Lock()
+		t.err = err
+		t.mut.Unlock()
+		l.Infoln("Listen (BEP/quic):", err)
+		return
+	}
+	defer func() { _ = packetConn.Close() }()
+
+	svc, conn := stun.New(t.cfg, t, packetConn)
+	defer func() { _ = conn.Close() }()
+
+	go svc.Serve()
+	defer svc.Stop()
+
+	registry.Register(t.uri.Scheme, conn)
+	defer registry.Unregister(t.uri.Scheme, conn)
+
+	listener, err := quic.Listen(conn, t.tlsCfg, quicConfig)
+	if err != nil {
+		t.mut.Lock()
+		t.err = err
+		t.mut.Unlock()
+		l.Infoln("Listen (BEP/quic):", err)
+		return
+	}
+
+	l.Infof("QUIC listener (%v) starting", packetConn.LocalAddr())
+	defer l.Infof("QUIC listener (%v) shutting down", packetConn.LocalAddr())
+
+	// Accept is forever, so handle stops externally.
+	go func() {
+		select {
+		case <-t.stop:
+			_ = listener.Close()
+		}
+	}()
+
+	for {
+		// Blocks forever, see https://github.com/lucas-clemente/quic-go/issues/1915
+		session, err := listener.Accept()
+
+		select {
+		case <-t.stop:
+			if err == nil {
+				_ = session.Close()
+			}
+			return
+		default:
+		}
+		if err != nil {
+			if err, ok := err.(net.Error); !ok || !err.Timeout() {
+				l.Warnln("Listen (BEP/quic): Accepting connection:", err)
+			}
+			continue
+		}
+
+		l.Debugln("connect from", session.RemoteAddr())
+
+		// Accept blocks forever, give it 10s to do it's thing.
+		ok := make(chan struct{})
+		go func() {
+			select {
+			case <-ok:
+				return
+			case <-t.stop:
+				_ = session.Close()
+			case <-time.After(10 * time.Second):
+				l.Debugln("timed out waiting for AcceptStream on", session.RemoteAddr())
+				_ = session.Close()
+			}
+		}()
+
+		stream, err := session.AcceptStream()
+		close(ok)
+		if err != nil {
+			l.Debugln("failed to accept stream from", session.RemoteAddr(), err.Error())
+			_ = session.Close()
+			continue
+		}
+
+		t.conns <- internalConn{&quicTlsConn{session, stream, nil}, connTypeQUICServer, quicPriority}
+	}
+}
+
+func (t *quicListener) Stop() {
+	close(t.stop)
+}
+
+func (t *quicListener) URI() *url.URL {
+	return t.uri
+}
+
+func (t *quicListener) WANAddresses() []*url.URL {
+	uris := t.LANAddresses()
+	t.mut.Lock()
+	if t.address != nil {
+		uris = append(uris, t.address)
+	}
+	t.mut.Unlock()
+	return uris
+}
+
+func (t *quicListener) LANAddresses() []*url.URL {
+	return []*url.URL{t.uri}
+}
+
+func (t *quicListener) Error() error {
+	t.mut.Lock()
+	err := t.err
+	t.mut.Unlock()
+	return err
+}
+
+func (t *quicListener) String() string {
+	return t.uri.String()
+}
+
+func (t *quicListener) Factory() listenerFactory {
+	return t.factory
+}
+
+func (t *quicListener) NATType() string {
+	v := t.nat.Load().(stun.NATType)
+	if v == stun.NATUnknown || v == stun.NATError {
+		return "unknown"
+	}
+	return v.String()
+}
+
+type quicListenerFactory struct{}
+
+func (f *quicListenerFactory) Valid(config.Configuration) error {
+	return nil
+}
+
+func (f *quicListenerFactory) New(uri *url.URL, cfg config.Wrapper, tlsCfg *tls.Config, conns chan internalConn, natService *nat.Service) genericListener {
+	l := &quicListener{
+		uri:     fixupPort(uri, config.DefaultQUICPort),
+		cfg:     cfg,
+		tlsCfg:  tlsCfg,
+		conns:   conns,
+		stop:    make(chan struct{}),
+		factory: f,
+	}
+	l.nat.Store(stun.NATUnknown)
+	return l
+}
+
+func (quicListenerFactory) Enabled(cfg config.Configuration) bool {
+	return true
+}

lib/connections/quic_misc.go

@@ -0,0 +1,66 @@
+// 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 http://mozilla.org/MPL/2.0/.
+
+// +build go1.12
+
+package connections
+
+import (
+	"net"
+
+	"github.com/lucas-clemente/quic-go"
+)
+
+var (
+	quicConfig = &quic.Config{
+		ConnectionIDLength: 4,
+		KeepAlive:          true,
+	}
+)
+
+type quicTlsConn struct {
+	quic.Session
+	quic.Stream
+	// If we created this connection, we should be the ones closing it.
+	createdConn net.PacketConn
+}
+
+func (q *quicTlsConn) Close() error {
+	sterr := q.Stream.Close()
+	seerr := q.Session.Close()
+	var pcerr error
+	if q.createdConn != nil {
+		pcerr = q.createdConn.Close()
+	}
+	if sterr != nil {
+		return sterr
+	}
+	if seerr != nil {
+		return seerr
+	}
+	return pcerr
+}
+
+// Sort available packet connections by ip address, preferring unspecified local address.
+func packetConnLess(i interface{}, j interface{}) bool {
+	iIsUnspecified := false
+	jIsUnspecified := false
+	iLocalAddr := i.(net.PacketConn).LocalAddr()
+	jLocalAddr := j.(net.PacketConn).LocalAddr()
+
+	if host, _, err := net.SplitHostPort(iLocalAddr.String()); err == nil {
+		iIsUnspecified = host == "" || net.ParseIP(host).IsUnspecified()
+	}
+	if host, _, err := net.SplitHostPort(jLocalAddr.String()); err == nil {
+		jIsUnspecified = host == "" || net.ParseIP(host).IsUnspecified()
+	}
+
+	if jIsUnspecified == iIsUnspecified {
+		return len(iLocalAddr.Network()) < len(jLocalAddr.Network())
+	}
+
+	return iIsUnspecified
+}

lib/connections/quic_misc_test.go

@@ -0,0 +1,92 @@
+// 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 http://mozilla.org/MPL/2.0/.
+
+// +build go1.12
+
+package connections
+
+import (
+	"net"
+	"testing"
+	"time"
+)
+
+type mockPacketConn struct {
+	addr mockedAddr
+}
+
+func (mockPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	panic("implement me")
+}
+
+func (mockPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	panic("implement me")
+}
+
+func (mockPacketConn) Close() error {
+	panic("implement me")
+}
+
+func (c *mockPacketConn) LocalAddr() net.Addr {
+	return c.addr
+}
+
+func (mockPacketConn) SetDeadline(t time.Time) error {
+	panic("implement me")
+}
+
+func (mockPacketConn) SetReadDeadline(t time.Time) error {
+	panic("implement me")
+}
+
+func (mockPacketConn) SetWriteDeadline(t time.Time) error {
+	panic("implement me")
+}
+
+type mockedAddr struct {
+	network string
+	addr    string
+}
+
+func (a mockedAddr) Network() string {
+	return a.network
+}
+
+func (a mockedAddr) String() string {
+	return a.addr
+}
+
+func TestPacketConnLess(t *testing.T) {
+	cases := []struct {
+		netA  string
+		addrA string
+		netB  string
+		addrB string
+	}{
+		// B is assumed the winner.
+		{"tcp", "127.0.0.1:1234", "tcp", ":1235"},
+		{"tcp", "127.0.0.1:1234", "tcp", "0.0.0.0:1235"},
+		{"tcp4", "0.0.0.0:1234", "tcp", "0.0.0.0:1235"}, // tcp4 on the first one
+	}
+
+	for i, testCase := range cases {
+
+		conns := []*mockPacketConn{
+			{mockedAddr{testCase.netA, testCase.addrA}},
+			{mockedAddr{testCase.netB, testCase.addrB}},
+		}
+
+		if packetConnLess(conns[0], conns[1]) {
+			t.Error(i, "unexpected")
+		}
+		if !packetConnLess(conns[1], conns[0]) {
+			t.Error(i, "unexpected")
+		}
+		if packetConnLess(conns[0], conns[0]) || packetConnLess(conns[1], conns[1]) {
+			t.Error(i, "unexpected")
+		}
+	}
+}

lib/connections/registry/registry.go

@@ -0,0 +1,89 @@
+// 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/.
+
+// Registry tracks connections/addresses on which we are listening on, to allow us to pick a connection/address that
+// has a NAT port mapping. This also makes our outgoing port stable and same as incoming port which should allow
+// better probability of punching through.
+package registry
+
+import (
+	"sort"
+	"strings"
+
+	"github.com/syncthing/syncthing/lib/sync"
+)
+
+var (
+	Default = New()
+)
+
+type Registry struct {
+	mut       sync.Mutex
+	available map[string][]interface{}
+}
+
+func New() *Registry {
+	return &Registry{
+		mut:       sync.NewMutex(),
+		available: make(map[string][]interface{}),
+	}
+}
+
+func (r *Registry) Register(scheme string, item interface{}) {
+	r.mut.Lock()
+	defer r.mut.Unlock()
+
+	r.available[scheme] = append(r.available[scheme], item)
+}
+
+func (r *Registry) Unregister(scheme string, item interface{}) {
+	r.mut.Lock()
+	defer r.mut.Unlock()
+
+	candidates := r.available[scheme]
+	for i, existingItem := range candidates {
+		if existingItem == item {
+			copy(candidates[i:], candidates[i+1:])
+			candidates[len(candidates)-1] = nil
+			r.available[scheme] = candidates[:len(candidates)-1]
+			break
+		}
+	}
+}
+
+func (r *Registry) Get(scheme string, less func(i, j interface{}) bool) interface{} {
+	r.mut.Lock()
+	defer r.mut.Unlock()
+
+	candidates := make([]interface{}, 0)
+	for availableScheme, items := range r.available {
+		// quic:// should be considered ok for both quic4:// and quic6://
+		if strings.HasPrefix(scheme, availableScheme) {
+			candidates = append(candidates, items...)
+		}
+	}
+
+	if len(candidates) == 0 {
+		return nil
+	}
+
+	sort.Slice(candidates, func(i, j int) bool {
+		return less(candidates[i], candidates[j])
+	})
+	return candidates[0]
+}
+
+func Register(scheme string, item interface{}) {
+	Default.Register(scheme, item)
+}
+
+func Unregister(scheme string, item interface{}) {
+	Default.Unregister(scheme, item)
+}
+
+func Get(scheme string, less func(i, j interface{}) bool) interface{} {
+	return Default.Get(scheme, less)
+}

lib/connections/registry/registry_test.go

@@ -0,0 +1,71 @@
+// 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 registry
+
+import (
+	"testing"
+)
+
+func TestRegistry(t *testing.T) {
+	r := New()
+
+	if res := r.Get("int", intLess); res != nil {
+		t.Error("unexpected")
+	}
+
+	r.Register("int", 1)
+	r.Register("int", 11)
+	r.Register("int4", 4)
+	r.Register("int4", 44)
+	r.Register("int6", 6)
+	r.Register("int6", 66)
+
+	if res := r.Get("int", intLess).(int); res != 1 {
+		t.Error("unexpected", res)
+	}
+
+	// int is prefix of int4, so returns 1
+	if res := r.Get("int4", intLess).(int); res != 1 {
+		t.Error("unexpected", res)
+	}
+
+	r.Unregister("int", 1)
+
+	// Check that falls through to 11
+	if res := r.Get("int", intLess).(int); res != 11 {
+		t.Error("unexpected", res)
+	}
+
+	// 6 is smaller than 11 available in int.
+	if res := r.Get("int6", intLess).(int); res != 6 {
+		t.Error("unexpected", res)
+	}
+
+	// Unregister 11, int should be impossible to find
+	r.Unregister("int", 11)
+	if res := r.Get("int", intLess); res != nil {
+		t.Error("unexpected")
+	}
+
+	// Unregister a second time does nothing.
+	r.Unregister("int", 1)
+
+	// Can have multiple of the same
+	r.Register("int", 1)
+	r.Register("int", 1)
+	r.Unregister("int", 1)
+
+	if res := r.Get("int4", intLess).(int); res != 1 {
+		t.Error("unexpected", res)
+	}
+}
+
+func intLess(i, j interface{}) bool {
+	iInt := i.(int)
+	jInt := j.(int)
+	return iInt < jInt
+}

lib/connections/relay_dial.go

@@ -17,6 +17,8 @@ import (
 	"github.com/syncthing/syncthing/lib/relay/client"
 )
 
+const relayPriority = 200
+
 func init() {
 	dialers["relay"] = relayDialerFactory{}
 }

lib/connections/service.go

@@ -90,10 +90,22 @@ var tlsVersionNames = map[uint16]string{
 // dialers. Successful connections are handed to the model.
 type Service interface {
 	suture.Service
-	Status() map[string]interface{}
+	ListenerStatus() map[string]ListenerStatusEntry
+	ConnectionStatus() map[string]ConnectionStatusEntry
 	NATType() string
 }
 
+type ListenerStatusEntry struct {
+	Error        *string  `json:"error"`
+	LANAddresses []string `json:"lanAddresses"`
+	WANAddresses []string `json:"wanAddresses"`
+}
+
+type ConnectionStatusEntry struct {
+	When  time.Time `json:"when"`
+	Error *string   `json:"error"`
+}
+
 type service struct {
 	*suture.Supervisor
 	cfg                  config.Wrapper
@@ -112,6 +124,9 @@ type service struct {
 	listeners          map[string]genericListener
 	listenerTokens     map[string]suture.ServiceToken
 	listenerSupervisor *suture.Supervisor
+
+	connectionStatusMut sync.RWMutex
+	connectionStatus    map[string]ConnectionStatusEntry // address -> latest error/status
 }
 
 func NewService(cfg config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *tls.Config, discoverer discover.Finder,
@@ -151,6 +166,9 @@ func NewService(cfg config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *t
 			FailureBackoff:    600 * time.Second,
 			PassThroughPanics: true,
 		}),
+
+		connectionStatusMut: sync.NewRWMutex(),
+		connectionStatus:    make(map[string]ConnectionStatusEntry),
 	}
 	cfg.Subscribe(service)
 
@@ -357,7 +375,7 @@ func (s *service) connect() {
 				}
 			}
 
-			addrs = util.UniqueStrings(addrs)
+			addrs = util.UniqueTrimmedStrings(addrs)
 
 			l.Debugln("Reconnect loop for", deviceID, addrs)
 
@@ -378,18 +396,23 @@ func (s *service) connect() {
 
 				uri, err := url.Parse(addr)
 				if err != nil {
+					s.setConnectionStatus(addr, err)
 					l.Infof("Parsing dialer address %s: %v", addr, err)
 					continue
 				}
 
 				if len(deviceCfg.AllowedNetworks) > 0 {
 					if !IsAllowedNetwork(uri.Host, deviceCfg.AllowedNetworks) {
+						s.setConnectionStatus(addr, errors.New("network disallowed"))
 						l.Debugln("Network for", uri, "is disallowed")
 						continue
 					}
 				}
 
 				dialerFactory, err := getDialerFactory(cfg, uri)
+				if err != nil {
+					s.setConnectionStatus(addr, err)
+				}
 				switch err {
 				case nil:
 					// all good
@@ -424,6 +447,7 @@ func (s *service) connect() {
 				}
 
 				dialTargets = append(dialTargets, dialTarget{
+					addr:     addr,
 					dialer:   dialer,
 					priority: priority,
 					deviceID: deviceID,
@@ -431,7 +455,7 @@ func (s *service) connect() {
 				})
 			}
 
-			conn, ok := dialParallel(deviceCfg.DeviceID, dialTargets)
+			conn, ok := s.dialParallel(deviceCfg.DeviceID, dialTargets)
 			if ok {
 				s.conns <- conn
 			}
@@ -618,7 +642,7 @@ func (s *service) AllAddresses() []string {
 		}
 	}
 	s.listenersMut.RUnlock()
-	return util.UniqueStrings(addrs)
+	return util.UniqueTrimmedStrings(addrs)
 }
 
 func (s *service) ExternalAddresses() []string {
@@ -630,22 +654,22 @@ func (s *service) ExternalAddresses() []string {
 		}
 	}
 	s.listenersMut.RUnlock()
-	return util.UniqueStrings(addrs)
+	return util.UniqueTrimmedStrings(addrs)
 }
 
-func (s *service) Status() map[string]interface{} {
+func (s *service) ListenerStatus() map[string]ListenerStatusEntry {
+	result := make(map[string]ListenerStatusEntry)
 	s.listenersMut.RLock()
-	result := make(map[string]interface{})
 	for addr, listener := range s.listeners {
-		status := make(map[string]interface{})
+		var status ListenerStatusEntry
 
-		err := listener.Error()
-		if err != nil {
-			status["error"] = err.Error()
+		if err := listener.Error(); err != nil {
+			errStr := err.Error()
+			status.Error = &errStr
 		}
 
-		status["lanAddresses"] = urlsToStrings(listener.LANAddresses())
-		status["wanAddresses"] = urlsToStrings(listener.WANAddresses())
+		status.LANAddresses = urlsToStrings(listener.LANAddresses())
+		status.WANAddresses = urlsToStrings(listener.WANAddresses())
 
 		result[addr] = status
 	}
@@ -653,6 +677,28 @@ func (s *service) Status() map[string]interface{} {
 	return result
 }
 
+func (s *service) ConnectionStatus() map[string]ConnectionStatusEntry {
+	result := make(map[string]ConnectionStatusEntry)
+	s.connectionStatusMut.RLock()
+	for k, v := range s.connectionStatus {
+		result[k] = v
+	}
+	s.connectionStatusMut.RUnlock()
+	return result
+}
+
+func (s *service) setConnectionStatus(address string, err error) {
+	status := ConnectionStatusEntry{When: time.Now().UTC().Truncate(time.Second)}
+	if err != nil {
+		errStr := err.Error()
+		status.Error = &errStr
+	}
+
+	s.connectionStatusMut.Lock()
+	s.connectionStatus[address] = status
+	s.connectionStatusMut.Unlock()
+}
+
 func (s *service) NATType() string {
 	s.listenersMut.RLock()
 	defer s.listenersMut.RUnlock()
@@ -769,7 +815,7 @@ func IsAllowedNetwork(host string, allowed []string) bool {
 	return false
 }
 
-func dialParallel(deviceID protocol.DeviceID, dialTargets []dialTarget) (internalConn, bool) {
+func (s *service) dialParallel(deviceID protocol.DeviceID, dialTargets []dialTarget) (internalConn, bool) {
 	// Group targets into buckets by priority
 	dialTargetBuckets := make(map[int][]dialTarget, len(dialTargets))
 	for _, tgt := range dialTargets {
@@ -793,6 +839,7 @@ func dialParallel(deviceID protocol.DeviceID, dialTargets []dialTarget) (interna
 			wg.Add(1)
 			go func(tgt dialTarget) {
 				conn, err := tgt.Dial()
+				s.setConnectionStatus(tgt.addr, err)
 				if err == nil {
 					res <- conn
 				}

lib/connections/structs.go

@@ -9,6 +9,7 @@ package connections
 import (
 	"crypto/tls"
 	"fmt"
+	"io"
 	"net"
 	"net/url"
 	"time"
@@ -43,10 +44,19 @@ func (c completeConn) Close(err error) {
 	c.internalConn.Close()
 }
 
+type tlsConn interface {
+	io.ReadWriteCloser
+	ConnectionState() tls.ConnectionState
+	RemoteAddr() net.Addr
+	SetDeadline(time.Time) error
+	SetWriteDeadline(time.Time) error
+	LocalAddr() net.Addr
+}
+
 // internalConn is the raw TLS connection plus some metadata on where it
 // came from (type, priority).
 type internalConn struct {
-	*tls.Conn
+	tlsConn
 	connType connType
 	priority int
 }
@@ -58,6 +68,8 @@ const (
 	connTypeRelayServer
 	connTypeTCPClient
 	connTypeTCPServer
+	connTypeQUICClient
+	connTypeQUICServer
 )
 
 func (t connType) String() string {
@@ -70,6 +82,10 @@ func (t connType) String() string {
 		return "tcp-client"
 	case connTypeTCPServer:
 		return "tcp-server"
+	case connTypeQUICClient:
+		return "quic-client"
+	case connTypeQUICServer:
+		return "quic-server"
 	default:
 		return "unknown-type"
 	}
@@ -81,6 +97,8 @@ func (t connType) Transport() string {
 		return "relay"
 	case connTypeTCPClient, connTypeTCPServer:
 		return "tcp"
+	case connTypeQUICClient, connTypeQUICServer:
+		return "quic"
 	default:
 		return "unknown"
 	}
@@ -90,8 +108,8 @@ func (c internalConn) Close() {
 	// *tls.Conn.Close() does more than it says on the tin. Specifically, it
 	// sends a TLS alert message, which might block forever if the
 	// connection is dead and we don't have a deadline set.
-	c.SetWriteDeadline(time.Now().Add(250 * time.Millisecond))
-	c.Conn.Close()
+	_ = c.SetWriteDeadline(time.Now().Add(250 * time.Millisecond))
+	_ = c.tlsConn.Close()
 }
 
 func (c internalConn) Type() string {
@@ -195,6 +213,7 @@ func (o *onAddressesChangedNotifier) notifyAddressesChanged(l genericListener) {
 }
 
 type dialTarget struct {
+	addr     string
 	dialer   genericDialer
 	priority int
 	uri      *url.URL

lib/connections/tcp_dial.go

@@ -16,6 +16,8 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
+const tcpPriority = 10
+
 func init() {
 	factory := &tcpDialerFactory{}
 	for _, scheme := range []string{"tcp", "tcp4", "tcp6"} {

lib/db/instance.go

@@ -505,7 +505,7 @@ func (db *instance) getIndexID(device, folder []byte) protocol.IndexID {
 
 func (db *instance) setIndexID(device, folder []byte, id protocol.IndexID) {
 	bs, _ := id.Marshal() // marshalling can't fail
-	if err := db.Put(db.keyer.GenerateIndexIDKey(nil, device, folder), bs, nil); err != nil {
+	if err := db.Put(db.keyer.GenerateIndexIDKey(nil, device, folder), bs, nil); err != nil && err != leveldb.ErrClosed {
 		panic("storing index ID: " + err.Error())
 	}
 }

lib/db/lowlevel.go

@@ -9,12 +9,15 @@ package db
 import (
 	"os"
 	"strings"
+	"sync"
 	"sync/atomic"
 
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/errors"
+	"github.com/syndtr/goleveldb/leveldb/iterator"
 	"github.com/syndtr/goleveldb/leveldb/opt"
 	"github.com/syndtr/goleveldb/leveldb/storage"
+	"github.com/syndtr/goleveldb/leveldb/util"
 )
 
 const (
@@ -34,6 +37,9 @@ type Lowlevel struct {
 	location  string
 	folderIdx *smallIndex
 	deviceIdx *smallIndex
+	closed    bool
+	closeMut  *sync.RWMutex
+	iterWG    sync.WaitGroup
 }
 
 // Open attempts to open the database at the given location, and runs
@@ -94,15 +100,79 @@ func (db *Lowlevel) Committed() int64 {
 }
 
 func (db *Lowlevel) Put(key, val []byte, wo *opt.WriteOptions) error {
+	db.closeMut.RLock()
+	defer db.closeMut.RUnlock()
+	if db.closed {
+		return leveldb.ErrClosed
+	}
 	atomic.AddInt64(&db.committed, 1)
 	return db.DB.Put(key, val, wo)
 }
 
+func (db *Lowlevel) Write(batch *leveldb.Batch, wo *opt.WriteOptions) error {
+	db.closeMut.RLock()
+	defer db.closeMut.RUnlock()
+	if db.closed {
+		return leveldb.ErrClosed
+	}
+	return db.DB.Write(batch, wo)
+}
+
 func (db *Lowlevel) Delete(key []byte, wo *opt.WriteOptions) error {
+	db.closeMut.RLock()
+	defer db.closeMut.RUnlock()
+	if db.closed {
+		return leveldb.ErrClosed
+	}
 	atomic.AddInt64(&db.committed, 1)
 	return db.DB.Delete(key, wo)
 }
 
+func (db *Lowlevel) NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
+	return db.newIterator(func() iterator.Iterator { return db.DB.NewIterator(slice, ro) })
+}
+
+// newIterator returns an iterator created with the given constructor only if db
+// is not yet closed. If it is closed, a closedIter is returned instead.
+func (db *Lowlevel) newIterator(constr func() iterator.Iterator) iterator.Iterator {
+	db.closeMut.RLock()
+	defer db.closeMut.RUnlock()
+	if db.closed {
+		return &closedIter{}
+	}
+	db.iterWG.Add(1)
+	return &iter{
+		Iterator: constr(),
+		db:       db,
+	}
+}
+
+func (db *Lowlevel) GetSnapshot() snapshot {
+	s, err := db.DB.GetSnapshot()
+	if err != nil {
+		if err == leveldb.ErrClosed {
+			return &closedSnap{}
+		}
+		panic(err)
+	}
+	return &snap{
+		Snapshot: s,
+		db:       db,
+	}
+}
+
+func (db *Lowlevel) Close() {
+	db.closeMut.Lock()
+	if db.closed {
+		db.closeMut.Unlock()
+		return
+	}
+	db.closed = true
+	db.closeMut.Unlock()
+	db.iterWG.Wait()
+	db.DB.Close()
+}
+
 // NewLowlevel wraps the given *leveldb.DB into a *lowlevel
 func NewLowlevel(db *leveldb.DB, location string) *Lowlevel {
 	return &Lowlevel{
@@ -110,6 +180,8 @@ func NewLowlevel(db *leveldb.DB, location string) *Lowlevel {
 		location:  location,
 		folderIdx: newSmallIndex(db, []byte{KeyTypeFolderIdx}),
 		deviceIdx: newSmallIndex(db, []byte{KeyTypeDeviceIdx}),
+		closeMut:  &sync.RWMutex{},
+		iterWG:    sync.WaitGroup{},
 	}
 }
 
@@ -150,7 +222,85 @@ func (b *batch) checkFlush() {
 }
 
 func (b *batch) flush() {
-	if err := b.db.Write(b.Batch, nil); err != nil {
+	if err := b.db.Write(b.Batch, nil); err != nil && err != leveldb.ErrClosed {
 		panic(err)
 	}
 }
+
+type closedIter struct{}
+
+func (it *closedIter) Release()                           {}
+func (it *closedIter) Key() []byte                        { return nil }
+func (it *closedIter) Value() []byte                      { return nil }
+func (it *closedIter) Next() bool                         { return false }
+func (it *closedIter) Prev() bool                         { return false }
+func (it *closedIter) First() bool                        { return false }
+func (it *closedIter) Last() bool                         { return false }
+func (it *closedIter) Seek(key []byte) bool               { return false }
+func (it *closedIter) Valid() bool                        { return false }
+func (it *closedIter) Error() error                       { return leveldb.ErrClosed }
+func (it *closedIter) SetReleaser(releaser util.Releaser) {}
+
+type snapshot interface {
+	Get([]byte, *opt.ReadOptions) ([]byte, error)
+	Has([]byte, *opt.ReadOptions) (bool, error)
+	NewIterator(*util.Range, *opt.ReadOptions) iterator.Iterator
+	Release()
+}
+
+type closedSnap struct{}
+
+func (s *closedSnap) Get([]byte, *opt.ReadOptions) ([]byte, error) { return nil, leveldb.ErrClosed }
+func (s *closedSnap) Has([]byte, *opt.ReadOptions) (bool, error)   { return false, leveldb.ErrClosed }
+func (s *closedSnap) NewIterator(*util.Range, *opt.ReadOptions) iterator.Iterator {
+	return &closedIter{}
+}
+func (s *closedSnap) Release() {}
+
+type snap struct {
+	*leveldb.Snapshot
+	db *Lowlevel
+}
+
+func (s *snap) NewIterator(slice *util.Range, ro *opt.ReadOptions) iterator.Iterator {
+	return s.db.newIterator(func() iterator.Iterator { return s.Snapshot.NewIterator(slice, ro) })
+}
+
+// iter implements iterator.Iterator which allows tracking active iterators
+// and aborts if the underlying database is being closed.
+type iter struct {
+	iterator.Iterator
+	db *Lowlevel
+}
+
+func (it *iter) Release() {
+	it.db.iterWG.Done()
+	it.Iterator.Release()
+}
+
+func (it *iter) Next() bool {
+	return it.execIfNotClosed(it.Iterator.Next)
+}
+func (it *iter) Prev() bool {
+	return it.execIfNotClosed(it.Iterator.Prev)
+}
+func (it *iter) First() bool {
+	return it.execIfNotClosed(it.Iterator.First)
+}
+func (it *iter) Last() bool {
+	return it.execIfNotClosed(it.Iterator.Last)
+}
+func (it *iter) Seek(key []byte) bool {
+	return it.execIfNotClosed(func() bool {
+		return it.Iterator.Seek(key)
+	})
+}
+
+func (it *iter) execIfNotClosed(fn func() bool) bool {
+	it.db.closeMut.RLock()
+	defer it.db.closeMut.RUnlock()
+	if it.db.closed {
+		return false
+	}
+	return fn()
+}

lib/db/transactions.go

@@ -14,17 +14,13 @@ import (
 
 // A readOnlyTransaction represents a database snapshot.
 type readOnlyTransaction struct {
-	*leveldb.Snapshot
+	snapshot
 	keyer keyer
 }
 
 func (db *instance) newReadOnlyTransaction() readOnlyTransaction {
-	snap, err := db.GetSnapshot()
-	if err != nil {
-		panic(err)
-	}
 	return readOnlyTransaction{
-		Snapshot: snap,
+		snapshot: db.GetSnapshot(),
 		keyer:    db.keyer,
 	}
 }
@@ -129,7 +125,10 @@ func (t readWriteTransaction) updateGlobal(gk, keyBuf, folder, device []byte, fi
 		if new, ok := t.getFileByKey(keyBuf); ok {
 			global = new
 		} else {
-			panic("This file must exist in the db")
+			// This file must exist in the db, so this must be caused
+			// by the db being closed - bail out.
+			l.Debugln("File should exist:", name)
+			return keyBuf, false
 		}
 	}
 
@@ -246,7 +245,10 @@ func (t readWriteTransaction) removeFromGlobal(gk, keyBuf, folder, device []byte
 		keyBuf = t.keyer.GenerateDeviceFileKey(keyBuf, folder, fl.Versions[0].Device, file)
 		global, ok := t.getFileByKey(keyBuf)
 		if !ok {
-			panic("This file must exist in the db")
+			// This file must exist in the db, so this must be caused
+			// by the db being closed - bail out.
+			l.Debugln("File should exist:", file)
+			return keyBuf
 		}
 		keyBuf = t.updateLocalNeed(keyBuf, folder, file, fl, global)
 		meta.addFile(protocol.GlobalDeviceID, global)

lib/discover/cache.go

@@ -7,6 +7,7 @@
 package discover
 
 import (
+	"sort"
 	stdsync "sync"
 	"time"
 
@@ -121,11 +122,12 @@ func (m *cachingMux) Lookup(deviceID protocol.DeviceID) (addresses []string, err
 	}
 	m.mut.RUnlock()
 
+	addresses = util.UniqueTrimmedStrings(addresses)
+	sort.Strings(addresses)
+
 	l.Debugln("lookup results for", deviceID)
 	l.Debugln("  addresses: ", addresses)
 
-	addresses = util.UniqueStrings(addresses)
-
 	return addresses, nil
 }
 
@@ -185,7 +187,7 @@ func (m *cachingMux) Cache() map[protocol.DeviceID]CacheEntry {
 	m.mut.RUnlock()
 
 	for k, v := range res {
-		v.Addresses = util.UniqueStrings(v.Addresses)
+		v.Addresses = util.UniqueTrimmedStrings(v.Addresses)
 		res[k] = v
 	}
 

lib/fs/basicfs.go

@@ -8,6 +8,7 @@ package fs
 
 import (
 	"errors"
+	"fmt"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -334,3 +335,13 @@ func longFilenameSupport(path string) string {
 	}
 	return path
 }
+
+type ErrWatchEventOutsideRoot struct{ msg string }
+
+func (e *ErrWatchEventOutsideRoot) Error() string {
+	return e.msg
+}
+
+func (f *BasicFilesystem) newErrWatchEventOutsideRoot(absPath, root string) *ErrWatchEventOutsideRoot {
+	return &ErrWatchEventOutsideRoot{fmt.Sprintf("Watching for changes encountered an event outside of the filesystem root: f.root==%v, root==%v, path==%v. This should never happen, please report this message to forum.syncthing.net.", f.root, root, absPath)}
+}

lib/fs/basicfs_test.go

@@ -566,3 +566,9 @@ func TestRel(t *testing.T) {
 		}
 	}
 }
+
+func TestBasicWalkSkipSymlink(t *testing.T) {
+	_, dir := setup(t)
+	defer os.RemoveAll(dir)
+	testWalkSkipSymlink(t, FilesystemTypeBasic, dir)
+}

lib/fs/basicfs_unix.go

@@ -9,7 +9,6 @@
 package fs
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -58,17 +57,17 @@ func (f *BasicFilesystem) Roots() ([]string, error) {
 }
 
 // unrootedChecked returns the path relative to the folder root (same as
-// unrooted). It panics if the given path is not a subpath and handles the
+// unrooted) or an error if the given path is not a subpath and handles the
 // special case when the given path is the folder root without a trailing
 // pathseparator.
-func (f *BasicFilesystem) unrootedChecked(absPath, root string) string {
+func (f *BasicFilesystem) unrootedChecked(absPath, root string) (string, *ErrWatchEventOutsideRoot) {
 	if absPath+string(PathSeparator) == root {
-		return "."
+		return ".", nil
 	}
 	if !strings.HasPrefix(absPath, root) {
-		panic(fmt.Sprintf("bug: Notify backend is processing a change outside of the filesystem root: f.root==%v, root==%v, path==%v", f.root, root, absPath))
+		return "", f.newErrWatchEventOutsideRoot(absPath, root)
 	}
-	return rel(absPath, root)
+	return rel(absPath, root), nil
 }
 
 func rel(path, prefix string) string {
@@ -76,3 +75,19 @@ func rel(path, prefix string) string {
 }
 
 var evalSymlinks = filepath.EvalSymlinks
+
+// watchPaths adjust the folder root for use with the notify backend and the
+// corresponding absolute path to be passed to notify to watch name.
+func (f *BasicFilesystem) watchPaths(name string) (string, string, error) {
+	root, err := evalSymlinks(f.root)
+	if err != nil {
+		return "", "", err
+	}
+
+	absName, err := rooted(name, root)
+	if err != nil {
+		return "", "", err
+	}
+
+	return filepath.Join(absName, "..."), root, nil
+}

lib/fs/basicfs_watch.go

@@ -11,8 +11,6 @@ package fs
 import (
 	"context"
 	"errors"
-	"path/filepath"
-	"runtime"
 
 	"github.com/syncthing/notify"
 )
@@ -22,21 +20,10 @@ import (
 // Not meant to be changed, but must be changeable for tests
 var backendBuffer = 500
 
-func (f *BasicFilesystem) Watch(name string, ignore Matcher, ctx context.Context, ignorePerms bool) (<-chan Event, error) {
-	evalRoot, err := evalSymlinks(f.root)
+func (f *BasicFilesystem) Watch(name string, ignore Matcher, ctx context.Context, ignorePerms bool) (<-chan Event, <-chan error, error) {
+	watchPath, root, err := f.watchPaths(name)
 	if err != nil {
-		return nil, err
-	}
-
-	absName, err := rooted(name, evalRoot)
-	if err != nil {
-		return nil, err
-	}
-
-	// Remove `\\?\` prefix if the path is just a drive letter as a dirty
-	// fix for https://github.com/syncthing/syncthing/issues/5578
-	if runtime.GOOS == "windows" && len(absName) <= 7 && len(absName) > 4 && absName[:4] == `\\?\` {
-		absName = absName[4:]
+		return nil, nil, err
 	}
 
 	outChan := make(chan Event)
@@ -49,26 +36,31 @@ func (f *BasicFilesystem) Watch(name string, ignore Matcher, ctx context.Context
 
 	if ignore.SkipIgnoredDirs() {
 		absShouldIgnore := func(absPath string) bool {
-			return ignore.ShouldIgnore(f.unrootedChecked(absPath, evalRoot))
+			rel, err := f.unrootedChecked(absPath, root)
+			if err != nil {
+				return true
+			}
+			return ignore.ShouldIgnore(rel)
 		}
-		err = notify.WatchWithFilter(filepath.Join(absName, "..."), backendChan, absShouldIgnore, eventMask)
+		err = notify.WatchWithFilter(watchPath, backendChan, absShouldIgnore, eventMask)
 	} else {
-		err = notify.Watch(filepath.Join(absName, "..."), backendChan, eventMask)
+		err = notify.Watch(watchPath, backendChan, eventMask)
 	}
 	if err != nil {
 		notify.Stop(backendChan)
 		if reachedMaxUserWatches(err) {
 			err = errors.New("failed to setup inotify handler. Please increase inotify limits, see https://docs.syncthing.net/users/faq.html#inotify-limits")
 		}
-		return nil, err
+		return nil, nil, err
 	}
 
-	go f.watchLoop(name, evalRoot, backendChan, outChan, ignore, ctx)
+	errChan := make(chan error)
+	go f.watchLoop(name, root, backendChan, outChan, errChan, ignore, ctx)
 
-	return outChan, nil
+	return outChan, errChan, nil
 }
 
-func (f *BasicFilesystem) watchLoop(name, evalRoot string, backendChan chan notify.EventInfo, outChan chan<- Event, ignore Matcher, ctx context.Context) {
+func (f *BasicFilesystem) watchLoop(name, evalRoot string, backendChan chan notify.EventInfo, outChan chan<- Event, errChan chan<- error, ignore Matcher, ctx context.Context) {
 	for {
 		// Detect channel overflow
 		if len(backendChan) == backendBuffer {
@@ -87,7 +79,18 @@ func (f *BasicFilesystem) watchLoop(name, evalRoot string, backendChan chan noti
 
 		select {
 		case ev := <-backendChan:
-			relPath := f.unrootedChecked(ev.Path(), evalRoot)
+			relPath, err := f.unrootedChecked(ev.Path(), evalRoot)
+			if err != nil {
+				select {
+				case errChan <- err:
+					l.Debugln(f.Type(), f.URI(), "Watch: Sending error", err)
+				case <-ctx.Done():
+				}
+				notify.Stop(backendChan)
+				l.Debugln(f.Type(), f.URI(), "Watch: Stopped due to", err)
+				return
+			}
+
 			if ignore.ShouldIgnore(relPath) {
 				l.Debugln(f.Type(), f.URI(), "Watch: Ignoring", relPath)
 				continue

lib/fs/basicfs_watch_test.go

@@ -149,36 +149,76 @@ func TestWatchRename(t *testing.T) {
 	testScenario(t, name, testCase, expectedEvents, allowedEvents, fakeMatcher{})
 }
 
+// TestWatchWinRoot checks that a watch at a drive letter does not panic due to
+// out of root event on every event.
+// https://github.com/syncthing/syncthing/issues/5695
+func TestWatchWinRoot(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("Windows specific test")
+	}
+
+	outChan := make(chan Event)
+	backendChan := make(chan notify.EventInfo, backendBuffer)
+	errChan := make(chan error)
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// testFs is Filesystem, but we need BasicFilesystem here
+	root := `D:\`
+	fs := newBasicFilesystem(root)
+	watch, root, err := fs.watchPaths(".")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				t.Error(r)
+			}
+			cancel()
+		}()
+		fs.watchLoop(".", root, backendChan, outChan, errChan, fakeMatcher{}, ctx)
+	}()
+
+	// filepath.Dir as watch has a /... suffix
+	name := "foo"
+	backendChan <- fakeEventInfo(filepath.Join(filepath.Dir(watch), name))
+
+	select {
+	case <-time.After(10 * time.Second):
+		cancel()
+		t.Errorf("Timed out before receiving event")
+	case ev := <-outChan:
+		if ev.Name != name {
+			t.Errorf("Unexpected event %v, expected %v", ev.Name, name)
+		}
+	case err := <-errChan:
+		t.Error("Received fatal watch error:", err)
+	case <-ctx.Done():
+	}
+}
+
 // TestWatchOutside checks that no changes from outside the folder make it in
 func TestWatchOutside(t *testing.T) {
 	outChan := make(chan Event)
 	backendChan := make(chan notify.EventInfo, backendBuffer)
+	errChan := make(chan error)
 
 	ctx, cancel := context.WithCancel(context.Background())
 
 	// testFs is Filesystem, but we need BasicFilesystem here
 	fs := newBasicFilesystem(testDirAbs)
 
-	go func() {
-		defer func() {
-			if recover() == nil {
-				select {
-				case <-ctx.Done(): // timed out
-				default:
-					t.Fatalf("Watch did not panic on receiving event outside of folder")
-				}
-			}
-			cancel()
-		}()
-		fs.watchLoop(".", testDirAbs, backendChan, outChan, fakeMatcher{}, ctx)
-	}()
+	go fs.watchLoop(".", testDirAbs, backendChan, outChan, errChan, fakeMatcher{}, ctx)
 
 	backendChan <- fakeEventInfo(filepath.Join(filepath.Dir(testDirAbs), "outside"))
 
 	select {
 	case <-time.After(10 * time.Second):
 		cancel()
-		t.Errorf("Timed out before panicing")
+		t.Errorf("Timed out before receiving error")
+	case <-errChan:
 	case <-ctx.Done():
 	}
 }
@@ -186,6 +226,7 @@ func TestWatchOutside(t *testing.T) {
 func TestWatchSubpath(t *testing.T) {
 	outChan := make(chan Event)
 	backendChan := make(chan notify.EventInfo, backendBuffer)
+	errChan := make(chan error)
 
 	ctx, cancel := context.WithCancel(context.Background())
 
@@ -193,7 +234,7 @@ func TestWatchSubpath(t *testing.T) {
 	fs := newBasicFilesystem(testDirAbs)
 
 	abs, _ := fs.rooted("sub")
-	go fs.watchLoop("sub", testDirAbs, backendChan, outChan, fakeMatcher{}, ctx)
+	go fs.watchLoop("sub", testDirAbs, backendChan, outChan, errChan, fakeMatcher{}, ctx)
 
 	backendChan <- fakeEventInfo(filepath.Join(abs, "file"))
 
@@ -206,6 +247,8 @@ func TestWatchSubpath(t *testing.T) {
 		if ev.Name != filepath.Join("sub", "file") {
 			t.Errorf("While watching a subfolder, received an event with unexpected path %v", ev.Name)
 		}
+	case err := <-errChan:
+		t.Error("Received fatal watch error:", err)
 	}
 
 	cancel()
@@ -290,7 +333,7 @@ func TestWatchSymlinkedRoot(t *testing.T) {
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	if _, err := linkedFs.Watch(".", fakeMatcher{}, ctx, false); err != nil {
+	if _, _, err := linkedFs.Watch(".", fakeMatcher{}, ctx, false); err != nil {
 		panic(err)
 	}
 
@@ -303,14 +346,10 @@ func TestWatchSymlinkedRoot(t *testing.T) {
 }
 
 func TestUnrootedChecked(t *testing.T) {
-	var unrooted string
-	defer func() {
-		if recover() == nil {
-			t.Fatal("unrootedChecked did not panic on outside path, but returned", unrooted)
-		}
-	}()
 	fs := newBasicFilesystem(testDirAbs)
-	unrooted = fs.unrootedChecked("/random/other/path", testDirAbs)
+	if unrooted, err := fs.unrootedChecked("/random/other/path", testDirAbs); err == nil {
+		t.Error("unrootedChecked did not return an error on outside path, but returned", unrooted)
+	}
 }
 
 func TestWatchIssue4877(t *testing.T) {
@@ -381,7 +420,7 @@ func testScenario(t *testing.T, name string, testCase func(), expectedEvents, al
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
-	eventChan, err := testFs.Watch(name, fm, ctx, false)
+	eventChan, errChan, err := testFs.Watch(name, fm, ctx, false)
 	if err != nil {
 		panic(err)
 	}
@@ -391,9 +430,10 @@ func testScenario(t *testing.T, name string, testCase func(), expectedEvents, al
 	testCase()
 
 	select {
-	case <-time.After(time.Minute):
-		t.Errorf("Timed out before receiving all expected events")
-
+	case <-time.After(10 * time.Second):
+		t.Error("Timed out before receiving all expected events")
+	case err := <-errChan:
+		t.Error("Received fatal watch error:", err)
 	case <-ctx.Done():
 	}
 }