* https://bugzilla.redhat.com/show_bug.cgi?id=727068
-* for socket units don't inherit global stdout setting.
-
* internal restart counter for units (focus on auto-respawn)
* finer-grained auto-respawn settings (rate-limit)
* GC unreferenced jobs (such as .device jobs)
-* avoid DefaultStandardOutput=syslog to have any effect on StandardInput=socket services
-
* cgroup_notify_empty(): recursively check groups up the tree, too
* when failing to start a service due to ratelimiting, try again later, if restart=always is set