Changes in 2.1:

* Fixed Advanced Query page: multi-selection listboxes weren't working;
was querying for "|kenstir".  Patch suggested by
Carl_Lindberg@BLaCKSMITH.com.

* site_callback() extended.  Now called for additional reasons:
        page_footer --   can print extra stuff near the bottom of the
                         page, e.g. to add buttons on the view page
        page_end_html -- can extend the absolute end of the page
Requested by Carl_Lindberg@BLaCKSMITH.com.

* --- INCOMPATIBILE CHANGES to site_callback() ---
  - When the $reason is 'page_heading', the argument list is different.
    See gnatsweb-site-sente.pl for example.  Changed for consistency.
  - No need for reason 'view_postlude'; can be done with 'page_footer'.

Changes in 2.0:

* Stored queries.

* Query results can be sorted by clicking on a column heading.

* Advanced query page for access to full power of gnats.

* Integrated with Matt Gerassimoff's "gnats.pl" for gnatsd hipness.
