* properly handle .mount unit state tracking when two mount points are stacked one on top of another on the exact same mount point.
-* shorten the message to sane length:
- "Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service
- failed to load: No such file or directory. See system logs and 'systemctl status display-manager.service' for details."
-
* sd_bus_unref() is broken regarding self-references and "pseudo thread-safety".
See the comment in sd_bus_unref() for more..
* figure out a nice way how we can let the admin know what child/sibling unit causes cgroup membership for a specific unit
-* add a kernel command line option to enable the debug shell
-
* journalctl: add the ability to look for the most recent process of a binary. journalctl /usr/bin/X11 --pid=-1 or so...
* set NOTIFY_SOCKET also for control processes
* allow port=0 in .socket units
-* support systemd.mask= on the kernel command line.
-
* recreate systemd's D-Bus private socket file on SIGUSR2
* Support --test based on current system state