Forward-port from mod_dav 1.0:

* server/util_xml.c (ap_xml_parse_input): Give a 413 (Request Entity
Too Large) not a 400 if the client exceeds the configured XML request
body limit.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102959 13f79535-47bb-0310-9956-ffa450edef68