======Synopsis:======
[[on]] [<modes>]hook [<serial#>] [-|^]<match> { <action> }

======Description:======
This hook is triggered whenever the [[HOOK]] command is issued with the
appropriate arguments.  Its sole purpose is to be hooked by [[HOOK]].  It is
useful for avoiding alias recursion.

======Parameters:======
|$*   |text to hook |

=====Default Action:=====
If you don't suppress this event, the client will take no action.