Etherpad emails show wrong port (9000) when sending from version 1 running apache and mod_proxy

Etherpad emails may show as port 9000 if you are using mod_proxy(apache) in front of etherpad.

If this is a problem simply edit:

/usr/share/etherpad/etherpad/etc/etherpad.local.properties replacing hidePorts = false with hidePorts = true