Better IRC Scanning

[s-rah]

We currently only check known IRC ports we don't do much in the way of confirmation. We should connect (and in the case of IRCS pull the X.509 certificate).

We may want to consider snapshoting the IRC Welcome Message and Channel List also.

[JosephGregg]

we should also check ports 6660-6669 in addition to the 6697 port we are checking

[JosephGregg]

List of known irc servers:

3ur4xm2japn56c5f.onion 55wzwsjjocg3gcjp.onion 6axcig5jgptnkaj2.onion 6cd7qka6fo6aps2e.onion bskoid4l5redrw5m.onion deepirc23ukiben3.onion imb27556jpb6g65j.onion irc2p5zrbdk25rdy.onion qj3m7wxb7zw3qpri.onion unionsoe3yw6fxaq.onion wj4m5dffmecamzyt.onion