[pve-devel] cleanup and directory structure refactoring

[Thomas Lamprecht]

Removing some not really needed files.
Trying to cleanup the directory structure, e.g., having the test in bin
makes no sense, init.d is outated since a long time, putting all those
little network if-* helper scripts in its own directory seems
reasonable.

I had this in mind since quite a bit and figured that I just sent it.
Move or new directory names are open for change, if there are better
suggestions.