Bug#819404: libnagios-plugin-perl: should not be released in Stretch

[Florian Schlichting]

> libnagios-plugin-perl is obsolted and should not be released with
> stretch. Filling this bug so that it get's autoremoved from testing.

AFAIKS it has two reverse dependencies, which should be updated to use
Monitoring::Plugin:

- nagios-plugins-contrib by pkg-nagios-devel at lists.alioth.debian.org
- nagios-plugins-rabbitmq by Cyril Bouthors <cyril at boutho.rs>

Should we file separate bugs on those packages, or just expect them to
be aware of the general issue and interprete the testing removal as a
call to action?

Florian