Test for AP_USE_HSREGEX, not USE_HSREGEX, as that's what actually gets

defined (in ap_config_auto.h) when using the bundled hsregex.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84795 13f79535-47bb-0310-9956-ffa450edef68