Remove REQUEST_CHUNKED_PASS and change ap_discard_request_body()

to use REQUEST_CHUNKED_DECHUNK.

Because of this change, the need for handle_request_body() is gone,
so we remove that as well.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86827 13f79535-47bb-0310-9956-ffa450edef68