mod_lua: Decline to serve a request if the script doesn't exist, instead of...

mod_lua: Decline to serve a request if the script doesn't exist, instead of throwing an internal server error.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1370377 13f79535-47bb-0310-9956-ffa450edef68