o don't trip if PID file cannot be written.
Merge branch 'master' of github.com:hzeller/gmrender-resurrect
Merge branch 'master' of github.com:hzeller/gmrender-resurrect

Conflicts:
	src/main.c
Merge branch 'master' of github.com:hzeller/gmrender-resurrect
o Accept audio/* in general. Looks like mime-list is too specific
  for some (in particular radio streaming) types - even though we
  are able to decode it.