After reading through the docs I was struck a few times by ambiguity caused by your use of ‘config file’ and ‘configuration file’. I think William’s confusion is because its not clear if you mean wp-config.php or wp-cache-config.php, which is an important difference (unless it could be either, in which case that’s relevant too). If you changed uses of ‘config file’ to be the actual filename it would probably clear up several sections.