Memcached: memcached_gzip_flag directive. This directive allows to test desired flag as returned by memcached and sets Content-Encoding to gzip if one found. This is reimplementation of patch by Tomash Brechko as available on http://openhack.ru/. It should be a bit more correct though (at least I think so). In particular, it doesn't try to detect if we are able to gunzip data, but instead just sets correct Content-Encoding.