[dcc2] dcc multiuser chat

[codemastr]

> to bring together people from different nets one person must be on both
nets to act as a bridge, otherwise there is no way to pass the ctcps. This
would need to be standardised.

That reminds me of something... are we going to support something like a
"DCC server"? Many clients allow you to use DCC without ever going over IRC.
You instead specify the IP of someone to connect to and have a true p2p
connection. I believe they use port 59 as the server. This doesn't seem to
be addressed anywhere in the spec, the spec seems to rely heavily on CTCP
for the negotiation phase. This could be yet another issue where some client
coders see problems because they now have to reinvent the wheel and redefine
their DCC server protocol since the draft doesn't address it at all. Yet
again, to truly solve the compatibility issues of DCC, it would need to
implement a standard DCC Server protocol.

-- codemastr