Synopsis:
   on [<mode>]public_msg [<serial#>] [-|^]<match> { <action> }

Description:
   This hook is triggered whenever the client receives a public message in
   a channel from someone not actually in the channel.

Parameters:
   $0    nickname sending message
   $1    channel sent to
   $2-   text of message

Examples:
   To customize how these messages are displayed:
      on ^public_msg "*" {
         if ( [$1] == C ) {
            echo *** \($0\) $2-
         } {
            echo *** \($0:$1\) $2-
         }
      }

See Also:
   on(5) public, public_notice, public_notice; msg(1)