Features:
+* libdsystemd-bus should expose utf8 validation calls
+
* When using "systemd status" on a slice unit also show all messages
matching _SYSTEMD_SLICE= not just _SYSTEMD_UNIT=
interate through that to bring down complexity from O(n^2) to O(n)
when loading units
-* Move backlight and random-seed into /var/lib/systemd
-
* If we try to find a unit via a dangling symlink generate a clean
error. Currently we just ignore it and read the unit from the search
path anyway.