After more comparison with existing mod_proxy backends, such as http

it seems clear that we're going to need to be able to specify arbitrary
portions of the URL that need to be added to the path info.  Follow the
lead of mod_proxy_http and add the calculation of this into the canon
handler.

* modules/proxy/mod_proxy_fcgi.c
  (proxy_fcgi_canon): Add the path portion of the back end URL to the
   path_info of the request, via the ap_proxy_canonenc function.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/fcgi-proxy-dev@367208 13f79535-47bb-0310-9956-ffa450edef68