Improve translation (or sync to trunk/2.4)

Submitted by: takashi
Reviewed by:  AkahoriShunsuke <a.shunsuke2002 gmail.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1229058 13f79535-47bb-0310-9956-ffa450edef68