* support units generated by a generator and placed in /run/systemd/system/; the directory is
currently ignored because it is empty before the generatores are executed
-* let 'systemctl reboot' called as non-root talk to logind instead of systemd, to get polkit
- system policy in the loop of privilege checking, so normal users can possibly use /sbin/reboot
-
* Possibly, detect whether SysV init scripts can do reloading by looking for "echo Usage:" lines
* figure out whether we should leave dbus around during shutdown