Usage: `/LIST [pattern] [MIN minusers]'
Shows the Channel List window in which the accessable channels are listed. The optional [pattern] is used as a mask and the [MIN minusers] parameter prevents channels with less users to be displayed.
Examples:
`/LIST'
Returns a list of all public channels on available. Note that
'secret' channels are only shown when the user has actually joined
them.
`/LIST br* 6'
Returns all channels starting with BR and minimal 6 users present.