Various improvements and modification for Debian Wheezy.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@994 3c3d7b80-5828-415e-9f61-280b98178fff
Adapt monit service configurations to new monit behaviour.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@995 3c3d7b80-5828-415e-9f61-280b98178fff
Begin to implement Mantis 0001021: Add feature to revert configuration changes.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@996 3c3d7b80-5828-415e-9f61-280b98178fff