Merge r1837056 from trunk:

  *) http: Enforce consistently no response body with both 204 and 304
     statuses.  [Yann Ylavic]



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1840572 13f79535-47bb-0310-9956-ffa450edef68