systemctl: include -M or -H arguments in the hint

systemctl: include -M or -H arguments in the hint

https://github.com/elogind/elogind/issues/2431

Some newlines are added, but the output will still exceed 80 columns in many
cases. The fallback for oom conditions is changed from "n/a" to something
"<service>", and a similar pattern is used for the new code. This way we
have a realistic fallback for oom, which seems nicer than making the whole
function return an error code which would then have to be propagated.

$ systemctl -M fedora-rawhide restart elogind-networkd.service
Job for elogind-networkd.service failed because start of the service was attempted too often.
See "systemctl -M fedora-rawhide status elogind-networkd.service" and "journalctl -M fedora-rawhide -xe" for details.
To force a start use "systemctl -M fedora-rawhide reset-failed elogind-networkd.service"
followed by "systemctl -M fedora-rawhide start elogind-networkd.service" again.