Upgrading vogler.d.o to stretch?

["W. Martin Borgert" <debacle@debian.org>]

Hi,

to get a better XMPP experience, I would like to use prosody
and -modules from stretch-backports. vogler still runs jessie.

Is there any blocker preventing an upgrade?
Who knows enough about the installed SIP software to comment?
 
TIA & Cheers