* xs/Apache2/Access/Apache2__Access.h: return 'none' if RequestRec::auth_type
 is not set to stay compatible with older mod_perl.



git-svn-id: https://svn.apache.org/repos/asf/perl/modperl/branches/httpd24@1448104 13f79535-47bb-0310-9956-ffa450edef68