Remove systemd services with RefuseManualStop from needs-restarting

[nisbet-hubbard]

auditd, for instance, has RefuseManualStop=yes and so can’t really be restarted. needs-restarting -s should probably look at the unit files and remove any such services from consideration, or a depedency that can restart them may be substituted.

[evan-goode]

I think this is a good suggestion. I would rather somehow mark the RefuseManualStop=yes services in the output versus omitting them entirely. Maybe printing a warning on stderr would be best so it doesn't interfere with stdout.