Move the KeptBodySize directive, kept_body filters and the

ap_parse_request_body function out of the http module and into a
new module called mod_request, reducing the size of the core.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@647263 13f79535-47bb-0310-9956-ffa450edef68