+* leaving file open on mounted non-root filesystems breaks shutdown
+ systemd is confused if something goes:
+ mounted→unmounting→mounted
+
+* /lib/systemd/systemd-user-sessions stop seems to leave
+ processes behind
+
+* SIGQUIT on shutdown? avahi-daemon[202]: Got SIGQUIT, quitting.
+
+* check if bind mounts work:
+ https://bugzilla.novell.com/show_bug.cgi?id=652762