units: turn Wants=shutdown back into Requires=shutdown to avoid removal of jobs due to the impact minimizer

systemctl: short cut things if we aren't root and the user requested a reboot to suppress unnecessary wall message

log: bump up a number of log messages so that they are shown even if debug logging is disabled, for diagnostic purposes

dbus: send signals about jobs to the clients having created them unconditionally, and thus get rid of broadcast signals in most cases