Checkmk Werk 14816: Enhance detection of postfix installation

ID: 14816 Title: Enhance detection of postfix installation Component: agents Level: 1 Class: New feature Version: 2.2.0i1 We now can detect the PID of a running postgres instance if it is not installed in `/var/spool/postfix`. To do this we search for the pid file in the queue directory as reported by `postconf`. You can find the new instances after updating the check mk agent.