Nginx Memcached Hash Pass
=========================

Hash the key using SHA256 to ensure that it does not grow beyond the 
key length limit of memcached.


Configuration
-------------

Functionally equivalent to memcached_pass.

::
    set $memcached_hash_key $request_uri
    memcached_hash_pass 127.0.0.1:11211;

To serve gzipped content, set memcached_hash_gzip_flag to the decimal 
bit mask that your memcached client uses to signal a compressed value.

::
    memcached_hash_gzip_flag 2;