RPL_ISUPPORT (005) PREFIX is handled incorrectly

[NanoSector]

As per: http://www.irc.org/tech_docs/005.html

the PREFIX directive not only applies to usernames, which the bot assumes now, but also to channel names. This will require a bit of a rework, especially with various servers now making use of channel names like @#channel to differentiate between features: https://github.com/freenode/ircd-seven/pull/31