Proposal: switch init system to systemd or upstart

[md@Linux.IT (Marco d'Itri)]

It is more and more obvious that modern software needs an event-based 
init system.

Pros:
- more features
- stable support for advanced boot/SAN environments
- being more similar to one of the other relevant distributions (RHEL or 
  Ubuntu)
- things like gnome become easier to package

Cons:
- some work to do (how much depends on the choice and on the details.
  but keeping sysvinit on life support is not free either)

Since the init system strongly shapes many other packages, there has to
be only one and no other supported options.

-- 
ciao,
Marco