PolicyKit for many of PID1's priviliged operations such as
unit file enabling and disabling.
+ * "udevadm hwdb --update" learnt a new switch "--usr" for
+ placing the rebuilt hardware database in /usr instead of
+ /etc. When used only hardware database entries stored in
+ /usr will be used, and any user database entries in /etc are
+ ignored. This functionality is useful for vendors to ship a
+ pre-built database on systems where local configuration is
+ unnecessary or unlikely.
+
Contributions from: Andreas Henriksson, Andrei Borzenkov,
Angus Gibson, Ansgar Burchardt, Ben Wolsieffer, Brandon L.
Black, Christian Hesse, Cristian RodrÃguez, Daniel Buch,