Split jvb and sigalling on different servers
Test: signalling (prosody, jicofo) on heu20, videobridge on OVH, frees port 443, which allows users to connect their media streams even when behind restricted firewalls
config to change: /etc/jitsi/videobridge/config
Discussion see https://community.jitsi.org/t/jvb-how-to-listen-to-port-443/15017/6