The URL of the current page, including CGI parameters, but excluding those listed in the exclude attribute. Appends a '&' or '?' at the end to allow additionial parameters.
Note that if you are running a proxy server in front of the PageKit server, you probably want to use mod_proxy_add_uri.c. PageKit will take the URL from the frontend server using the X-Original-URI header that mod_proxy_add_uri sets.