[PATCH] net-mgmt/nagios: Adding monplugins flavor to nagios

[kiwi]

Summary

net-mgmt/nagios: Adding monplugins flavor to nagios

Some users asked to add a flavor to permit to have nagios already
packaged with monplugins.
This patch add this functionality and has been tested (both flavors
default and monplugins) with poudriere under 13.4-RELEASE.

Sponsored by:   Klara, Inc.
Approved by:    0mp (mentor)

[0mp]

LGTM

I've got some suggestions for the commit message:

• net-mgmt/nagios: Add monplugins flavor
• There is no need to mention in the final commit message that this patch has been tested.

Also, please make sure to create a bugzilla ticket for this change. Not all maintainers check Phabricator.