avahi: Fix certain problems.

I've fixed certain problems reported on the bugtracker:
* avahi user and group were missing.
* Runtime dependency "dbus" added.
* Fixed wrong localstatedir.
* Program was not killed correctly by initscript.

Fixes #10338.
glibc: Ship getent binary.
Nginx: Update to version 1.4.4 (stable version).
openvpn: Since port must be < 1024 we can drop the conflict check.

All the potentially conflicting ports are smaller than < 1024
and can therefore never be used any way.
Merge remote-tracking branch 'trikolon/nginx' into next
Merge remote-tracking branch 'stevee/avahi-fixes' into next