Automate pool submission

[darkk]

Email me ... with public IP address of your server ... to our community-supported pool

I suggest to automate submission of IP addresses to the pool to reduce manual labor. Here are some possible issues to think about:

• docker container may be behind NAT even with --net=host when it's run at, for example, end-user's SOHO network. Any of IP address discovery methods may be used to overcome that: TXT o-o.myaddr.l.google.com, A whoami.akamai.net, opendns, ripe, yandex and so on.
• in case of SOHO network uPNP may be used to get public IP as well (and do port forwarding on behalf of user)
• submission endpoint should, probably, be protected: e.g. it may be Onion Service in Tor network, RPC-over-DNS, or just plain good Qrator/Cloudflare if collateral freedom is not important :)
• proxies should, probably, be auto-checked from temporary network endpoints for same protection reasons: to avoid DDoS and blackholing of the checker IP address
• all pool proxies should have same user/pass for DNS-based pool to work, AFAIK telegram can't do better discovery & balancing at the moment :-(

OTOH, I'm looking at all those issues and I'm not sure if "userbase" of the docker image is large enough, so I would not be surprised if the issue will be closed with WONTFIX resolution :-)