Features:
+* logind: ignore inactive login screens when checking whether power key should be handled
+
+* introduce log_oom() or a similar call?
+
+* rename "userspace" to "core-os"
+
* append ".service" to unit names without any suffix (https://bugs.freedesktop.org/show_bug.cgi?id=39386)
* journalctl: add --priority switch