dnsdist: switch to mute "...control connection from..." messages

[paddg]

• Program: dnsdist
• Issue type: Feature request

Usecase

We are using a Nagios plugin to determine if backend servers are marked as down

#!/usr/bin/env bash
...
SHOWSERVERS=$(dnsdist --client --execute "showServers()" 2>/dev/null)
...
DOWN=$(echo "$SHOWSERVERS" | grep -i down | wc -l)
...

This leads to many journal entries each 3 minutes in our case:

Aug 01 06:26:20 node04 dnsdist[22101]: Got control connection from ...
Aug 01 06:26:20 node04 dnsdist[22101]: Closed control connection from ...
Aug 01 06:29:20 node04 dnsdist[22101]: Got control connection from ...
Aug 01 06:29:20 node04 dnsdist[22101]: Closed control connection from ...
...

Description

Would be fine if dnsdist had a switch to mute this messages.