Log an error in mod_proxy_http when reading the request body fails.
Follow-up to r1538776 where incomplete bodies are detected and an error returned through the input filters.



git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1570598 13f79535-47bb-0310-9956-ffa450edef68
update transformation


git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1570686 13f79535-47bb-0310-9956-ffa450edef68
Rebuild

git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1570758 13f79535-47bb-0310-9956-ffa450edef68