mod_lua: Prevent HTTP Response Splitting by not allowing tables in the...

mod_lua: Prevent HTTP Response Splitting by not allowing tables in the request_rec to be set with values containing newlines. 

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1582264 13f79535-47bb-0310-9956-ffa450edef68