A package is enabled if it is scheduled to run at server startup
and is deliverable by the request processor.
If a Tcl library file (*-procs.tcl) or query file (*.xql) is being
watched, the request processor monitors it, reloading it into running interpreters
whenever it is changed. This is useful during development
(so you don't have to restart the server for your changes to take
effect). To watch a file, click its package key above, click Manage file
information on the next screen, and click watch next to
the file's name on the following screen.