Add a piece of functionality to make all #words clickable to join the channel advertised on click.

[cthae]

It just makes sense that all #words-with-hashes-in-front-of-them are clickable.

[terrablue]

This functionality can be generalized to accord with RFC1459, section 1.3:

Channels names are strings (beginning with a '&' or '#' character) of
length up to 200 characters. Apart from the the requirement that the
first character being either '&' or '#'; the only restriction on a
channel name is that it may not contain any spaces (' '), a control G
(^G or ASCII 7), or a comma (',' which is used as a list item
separator by the protocol).