* Split MediaWiki namespace into MediaWiki and Template (requires changes to all language files)
* Purge links to on edit of Template namespace
* General refactoring of purging and cache invalidation code
elimination of the use of import_request_variables (which gives us all
the insecurity of register_globals). Uncomment the define of DEBUG_GLOBALS
in index.php to turn on extra error reporting and trace down use of
uninitialized variables and nassssty globals.
Also rearranged the magic_quotes fixing, may not yet cover everything...
