Fix up the path info in the balancer backend just like we do in the

Fix up the path info in the balancer backend just like we do in the
fcgi backend.  This lets Rails apps work under a balancer setup without
any hacks to Rails itself.

* modules/proxy/mod_proxy_balancer.c
  (proxy_balancer_canon): Set r->path_info based on the path we got
   from parsing the URL.

* modules/proxy/mod_proxy_fcgi.c
  (proxy_fcgi_canon): Remove the comment about balancer not setting
   the path_info.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/fcgi-proxy-dev@383291 13f79535-47bb-0310-9956-ffa450edef68