-* systemctl (and possibly related tools): support a new switch that
- allows enumerating units in local containers recursively. "systemctl
- list-units -R" or so should not only lists on the host, but also the
- services in all containers in a pretty way, to give an overview of
- the entire system.
+* systemctl: support --recursive for list-sockets, list-timers,
+ ... too, not just for list-units.