Features:
+* prefer /etc over /run?
+
* when dumping cgroup contents, include main/control PID of a service, explicitly
* keep an eye on https://bugzilla.gnome.org/show_bug.cgi?id=670100
* isolate for getty is still broken, due to logind
-* don't umount /usr
-
* default unix qlen is too small (10). bump sysctl? add sockopt?
* support units generated by a generator and placed in /run/systemd/system/; the directory is