+website URLs above to get a version of the site with debugging output enabled.
+
+<h4>Database and dictionary update receiver</h4>
+
+On the live system there are different trees, potentially with
+different versions, for receiving updates and managing the database,
+to the ones for displaying the website. The database management trees
+are normally accessed only via the upload client but you may also
+download their source directly:
+
+ <ul>
+ <li><a href="http://upload.yarrg.chiark.net/commod-update-receiver?get_source=1">Main production instance</a>
+ <li><a href="http://upload.yarrg.chiark.net/test/commod-update-receiver?get_source=1">Testing database instance</a>
+ </ul>