Updates:

- Remove reference to functions that are now inside mod_lua
- Remove a lot of "bla bla bla" placeholders
- Add information about optimizing mod_lua for production use
- Fix up the examples a bit

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1370899 13f79535-47bb-0310-9956-ffa450edef68