+ - logind: make the Suspend()/Hibernate() bus calls wait for the for
+ the job to be completed. before returning, so that clients can wait
+ for "systemctl suspend" to finish to know when the suspending is
+ complete.
+ - logind: when the power button is pressed short, just popup a
+ logout dialog. If it is pressed for 1s, do the usual
+ shutdown. Inspiration are Macs here.
+ - logind: allow users to kill or lock their own sessions
+ - expose "Locked" property on logind sesison objects
+ - given that logind now lets PID 1 do all nasty work, we can
+ probably reduce the capability set it retains substantially.
+ (we need CAP_SYS_ADMIN for drmSetMaster(), so maybe not worth it)
+ - expose orientation sensors and tablet mode through logind