start-py3o-fusion always opens a port on the outside by default

Created originally on Bitbucket by sixela (Alexis de Lattre)

When you start "start-py3o-fusion -s localhost", it will open a port "on the outside" by default. It should only listen on localhost and therefore be unreachable from the outside.

In the mean time, the only solution I found is to add an iptables rule to block incoming trafic on port 8765.

py3o.renderserver has the same problem, cf https://bitbucket.org/faide/py3o.renderserver/issues/8/py3o-render-server-always-opens-a-port-on