add utf8 extension to zh-cn html files


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1564806 13f79535-47bb-0310-9956-ffa450edef68
build bootstrap


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1564807 13f79535-47bb-0310-9956-ffa450edef68