firebird service
many suggestions contributed by bjornfor and edolstra
Merge pull request #209 from MarcWeber/submit/firebird

systemd/firebird
Remove the nixos.unstable job from the trunk-combined jobset
Properly wipe .compose-cache.
Fixes #267.
add simple rsnapshot module
implement bjornfors comments
rsnapshot: extraConfiguration -> extraConfig
rsnapshot: do not use /etc/rsnapshot.conf
Merge pull request #270 from aristidb/master

Add simple rsnapshot module
Merge commit 'refs/top-bases/systemd/virtualbox-server' into systemd/virtualbox-server

* commit 'refs/top-bases/systemd/virtualbox-server':
  rsnapshot: do not use /etc/rsnapshot.conf
  rsnapshot: extraConfiguration -> extraConfig
  implement bjornfors comments
  add simple rsnapshot module
  Properly wipe .compose-cache. Fixes #267.
  Remove the nixos.unstable job from the trunk-combined jobset
  firebird service many suggestions contributed by bjornfor and edolstra