Let systemd unit file use /etc/sysconfig/munge for munge options

[wpoely86]

Fixes #64

This allows you to cleanly specify options to munged. No need to change a unit file.

[dun]

Thanks for the PR. The main issue I see here is that Red Hat and SUSE use /etc/sysconfig, but Debian and Ubuntu use /etc/default.

Aside from that, the current "sysconfig" file specifies vars for NICE, USER, and GROUP which would have no effect in a systemd configuration. That means I should really have separate template files for sysvinit and systemd. And then the RPM specfile needs to be updated to install the correct template. A lot of this is dependent upon the autotools rework that has yet to be pulled into master, so I'll finish this up once that work is merged.

[kkm000]

The main issue I see here is that Red Hat and SUSE use /etc/sysconfig, but Debian and Ubuntu use /etc/default.

An (arguably ugly) workaround to unify the two is

EnvironmentFile=-/etc/sysconfig/munge
EnvironmentFile=-/etc/default/munge

The - prefix is to ignore a missing file.

[dun]

@kkm000: But that approach doesn't handle the differences between sysvinit and systemd (i.e., where the latter doesn't use NICE, USER, and GROUP). I'm hoping to do something a bit cleaner in the near future.

[kkm000]

@dun, true, the init scripts would not use them.

[wpoely86]

@dun Any plans for a version update of munge? Now this change and #23 are merged, it would be helpful to have a proper release.

[dun]

@wpoely86 Yes, 0.5.14 should be out in the next couple of weeks. Just wrapping up a few minor things. Among them, revisiting #23 to probably remove the restriction requiring the --origin arg to match an address assigned to a local network interface.