Syntax: %bLIST <pattern> [options]%b

Lists all registered channels that match %b<pattern>%b.
Channels that have %bSET PRIVATE%b ON, will not be
displayed.

Valid filter options are:
-b: list forbidden channels only
-f: list forgotten channels only
-n: only list channels with noexpire flag set
-p: list private channels only
-a: list registered channels which are currently in use

Example: %bLIST #*bleh*%b
           Lists all channels that contain %bbleh%b
