[dcc2] Multi headers + metadata

[codemastr]

> Or, more practically, call the other guy up on the phone (or even AIM,
> ICQ, etc.) and ask him to read off his key fingerprint.
Well, if someone is packet sniffing your connection, then they will see your
AIM/ICQ messages as well. As for phone... I don't want everyone I meet on
IRC having my phone number. For friends, fine. But, I don't want to have to
make a phonecall everytime I want to do a DCC send.

-- codemastr