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

Description:
   This hook is triggered whenever the unload(5) command is issued to unload
   a packaged script.

Parameters:
   $0-    the parameters passed to the /package command
          (NOTE that passing more than one argument to /package may cause
	  future incompatibilities, and should be avoided at all costs)

Examples:
   To inform the user that a script is exiting:
      on ^unload "superscript *" {
        echo *** SuperScript exiting. To infinity, and lots farther!
      }

See Also:
   package(5); unload(5)