webredirects is meant to make it easy for non-sysadmins to add new redirects
and setup site aliases for the Apache webserver.  It does this by allowing URL
redirects and site aliases to be managed through a web-based application.  It
also allows you to define a 'placeholder' site, for domains which point to your
domain but have not been setup yet.

The admin interface for managing the redirects stores the redirects and aliases
in an SQL database.  The backend of webredirects hooks into Apache with
mod_python and rewrites URLs to their new location by looking up the redirects
and site aliases in the SQL database.  It caches the results of the lookups in
memcached to speedup the URL rewrites.

                               -  Bart Cortooms <bart@kumina.nl>, Kumina, 2008