mod_lua: Add r:flush, r:sendfile as well as additional request information in...

mod_lua: Add r:flush, r:sendfile as well as additional request information in the request_rec structure

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1370158 13f79535-47bb-0310-9956-ffa450edef68