mod_reqtimeout: Fix body timeout disabling for CONNECT requests to avoid

triggering mod_proxy_connect's AH01018 once the tunnel is established.
https://bugzilla.mozilla.org/show_bug.cgi?id=1279483



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1754391 13f79535-47bb-0310-9956-ffa450edef68