after fighting some round with Metronome, I get the point that Metronome is not the best way to handle an XMPP Server for ISPCONFIG. After some searches and modifications I had a small script, that would change your ISPCONFIG Server from Metronome to Prosody.
!!! ATTENTION USE IT AT YOUR OWN RISK!!!!
!!! BACKUP BACKUP BACKUP BACKUP BACKUP!!!
The source of the system should be a perfect Server installation for DEbian with Apache and XMPP already activated.
So I made a Gist for everybody that would like to change there XMPP Server, you can find it here:
If you do not like to run all of the steps you can start them manually by hand as root.