as robots. Client may set this mode only to
itself.
+ q <nickname>[@<server>]
+
+ Set/unset user as quiet. When set the user cannot
+ talk on the channel, and cannot send messages to
+ the channel. This can be used by channel operator
+ to queit a certain misbehaving user. The user cannot
+ unset this mode itself. This mode cannot be set
+ or unset to yourself.
+
See also: CMODE, UMODE