Features:
+* mount /dev/.run and /var/run as bind mounts
+
* introduce "x-systemd-automount" as alternative to the "comment=systemd.automount" mount option
* show failure error string in "systemctl status"
document it? When doing that add switch to make this temporary by
placing mask links in /dev.
-* introduce simple way to do mandatory conditions
+* introduce simple way to do mandatory conditions (make current conditions mandatory, and introduce =| as non-mandatory conditions)
* detect LXC environment