Issues with passing through webui with orchestration

[ankarhem]

Hi,

I've tried setting this up with an orchestrator but I had issues with accessing the container from the reverse proxy. I think it is because rtorrent was trying to setup the iptables passthrough for web ui on 172.18.x.x but the network subnet for the overlay network was 10.x.x.x. (if I manually connected the container to the network with 172.18.x.x ip I could access the ui through that ip)

Could we have an env var to force cidr range that is used in the iptable rules?