Bring the debugging output up to date with the kind of things that are

Bring the debugging output up to date with the kind of things that are
actually being debugged at the moment.  Also note a problem with the way
we handle the path info setup.

* modules/proxy/mod_proxy_fcgi.c
  (proxy_fcgi_canon): Log the filename and path info when we set them,
   add a note that the path info stuff isn't being set if we're run in
   a balancer setup, which needs to be fixed somehow.
  (send_environment): Add an (ifdefed) call to log the environment vars
   we send to the backend server.
  (dump_header_to_log): Default to ifdefing this out, we're a bit beyond
   bugs in the raw FCGI protocol at this point and it fills up the logs.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/fcgi-proxy-dev@383239 13f79535-47bb-0310-9956-ffa450edef68