Support freebsd (OPNsense etc) for the included plugin isc_dhcpd

[dnlldl]

Support freebsd (OPNsense etc)

Thank you for your interest in contributing to Checkmk! Consider looking into Readme regarding process details.

General information

This is to make the isc_dhcpd plugin work with any recent version of OPNsense.

Proposed changes

The dhcpd.leases file is in a different location than expected by the script. The command pidof doesn't exist and awk is also more limited.

root@OPNsense:~ # awk --version
awk version 20210215