Convenience function which returns a url for a GET request to this
application.
-I<$params> is a hashref specifying the parameters and the PATH_INFO.
+I<$params> is a hashref specifying the parameters and the PATH_INFO
+(not including any parameters related to CGI::Auth::Flexible).
The keys are the parameter names, and the values are array refs with
the parameter value(s) (as strings, as yet unquoted). (They are array
refs because it is possible to pass multiple values for the same
cookie in the forms generated by C<check_ok>. You may also set it
yourself (and indeed you must do so if you use C<check_divert>).
+item C<< $authreq->_chain_params() >>
+
+Returns a hash of the "relevant" parameters to this request, in a form
+suitable for C<url_with_query_params>. This is all of the query
+parameters which are not related to CGI::Auth::Flexible. The
+PATH_INFO from the request is returned as the parameter C<< '' >>.
+
=back
=head1 OTHER FUNCTIONS AND METHODS