Saner error/debug messsages for permission issues
Translation update
Add routine for checking possible standby (fixes #565)
Merge pull request #571 from syncthing/recheck

Add routine for checking possible standby (fixes #565)
Set rescan interval on default repository (fixes #579)
Fix language detection, never show untranslated strings (fixes #543)
Document GOMAXPROCS instead of (useless) STDEADLOCKTIMEOUT
Info line formatting (ref #583)