SECURITY: CVE-2010-0408 (cve.mitre.org)

mod_proxy_ajp: Respond with HTTP_BAD_REQUEST when the body is not sent after
request headers indicate a request body is incoming; this is not a case of
HTTP_INTERNAL_SERVER_ERROR.

Submitted by: Niku Toivola <niku.toivola sulake.com>
Reviewed by: rpluem, jim, wrowe
Backports: r917875

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@917876 13f79535-47bb-0310-9956-ffa450edef68