* properly handle .mount unit state tracking when two mount points are stacked one on top of another on the exact same mount point.
Features:
+
+* expose switch-root in systemctl
+
+* remove old root in switch-root logic
+
* improve !/proc/*/loginuid situation: make /proc/*/loginuid less dependent on CONFIG_AUDIT,
or use the users cgroup information when /proc/*/loginuid is not available.
* automount: implement expire
* logind: auto-suspend, auto-shutdown:
- IdleAction=(none|suspend|hibernate|poweroff)
+ IdleAction=(none|suspend|opportunistic|hibernate|poweroff)
IdleActionDelay=...
SessionIdleMode=(explicit|ignore|login)
ForceShutdown=(yes|no)