[pkg-go] syncthing is marked for autoremoval from testing

[Debian testing autoremoval watch]

syncthing 0.14.18+dfsg1-2 is marked for autoremoval from testing on 2017-06-02

It (build-)depends on packages with these RC bugs:
860660: golang-github-cznic-fileutil: FTBFS on i386: dh_auto_test: go test -v -p 1 github.com/cznic/fileutil github.com/cznic/fileutil/falloc github.com/cznic/fileutil/hdb github.com/cznic/fileutil/storage returned exit code 1