After 60526f60a8 (#31),
`irccat.tcp.Run(irccat.irc)` is called (if the config calls for it)
before, rather than after, `irccat.connectIRC()`, which changes
`irccat.irc` away from a nil pointer in the first place.  This pointer
is copied into the `irc` field of a TCPListener `l` by
`irccat.tcp.Run()`.

A panic won't actually happen until the TCP listener handles its first
message, if it ever comes, and in doing so passes the nil pointer
further down to `dispatcher.Send(l.irc, ...)`.

To fix, bring the call to `irccat.connectIRC()` forward again, to before
any listener setup is done at all.  This probably makes sense
stylistically too.

This is useful for when your config file isn't in one of the usual
locations.

It was a never-ending source of bugs