mod_ext_filter: Ignore any content-type parameters when checking if

the response should be filtered.  Previously, "intype=text/html"
wouldn't match something like "text/html;charset=8859_1".


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96115 13f79535-47bb-0310-9956-ffa450edef68