better diagnostics for failures during dispatch()

git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1592032 13f79535-47bb-0310-9956-ffa450edef68
mod_proxy_fcgi: Fix occasional high CPU when handling request bodies.


git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1592037 13f79535-47bb-0310-9956-ffa450edef68