Feature - better path structure for cached files (file_driver)

[tobias992]

Hello,

at the moment all cached files are saved under
/path/to/wordpress/wp-content/uploads/cache-master/FOLDERNAME/file_driver/SOMEHASH.cache

This is not an optimal solution for e.g. nginx try_files optimization. With this we can bypass the php handler complete for much more performance. But for this we need a path structure like that:
/path/to/wordpress/wp-content/uploads/cache-master/file_driver/${http_host}${cache_uri}index.html