Add FreeBSD test & re-enable linux build.

.cirrus.yml

@@ -9,3 +9,5 @@ task:
     - CPPFLAGS=-I/usr/local/include/ LDFLAGS=-L/usr/local/lib/ ./configure --disable-md2man
     - make
     - ./rsync --version
+  test_script:
+    - make check

.github/workflows/ccpp.yml

@@ -2,7 +2,7 @@ name: build
 
 on:
   push:
-    branches: [ b3.0.x ]
+    branches: [ master ]
   pull_request:
     branches: [ master ]