Synopsis:
   hook <anything>

Description:
   HOOK is used for one thing only; to activate a HOOK hook.  Don't worry
   if that didn't make much sense.  The client has a mechanism by which
   an arbitrary hook may be defined that can be hooked at any time by
   the HOOK command.  The hook is created just like any other named
   hook, except only the HOOK command may trigger it.

Examples:
   This script will echo a line every 10 seconds:
      on ^hook "foo" {
         timer 10 {
            echo This line is repeated every 10 seconds
            hook foo
         }
      }
      hook foo

See Also:
   on(5) hook

Other Notes:
   The same functionality of HOOK can be obtained with normal aliases.
   However, use of HOOK is preferred as it avoids the need for recursive
   aliases (which have been known to cause trouble).