reverseproxy: fix slave-instance-list
Fix branch of development.cfg
Update md5sum of novnc.

archive may have changed.
Use older version of websockify.
Fix parameter name in zimbra-kvm instance.
Fix smtp-forntend request SR url.
Update documentation.
Add reverse-proxy-nginx documentation.
Update zimbra-kvm documentation
Request web frontend that is https-only.
Publish zimbra administration backend url.
Use public ipv4 as bind address if defined.