Changes the famous Memcached WP Object Cache backend to actually use the Memcached class (not the Memcache class). Implements wp_cache_get_multi() and wp_cache_set_multi()

wp_cache_get_multi( array(
    array( 'key', 'group' ),
    array( 'key', '' ),
    array( 'key', 'group' ),
    'key'
) );

wp_cache_set_multi( array(
    array( 'key', 'data', 'group' ),
    array( 'key', 'data' )
) );

Blog Post: http://scotty-t.com/2012/06/05/memcached-redux/

0.1.7

• Improved escaping in debug output ported from Memcached plugin (props @batmoo).
• Fixed PHP notice when no Memcached server:port manually specified.

0.1.6

• Corrected documentation
• Corrected stats collection (props @johnbillion)

0.1.5

• Added support for PHP 7+ by changing to __construct and pre-initializing stats

0.1.3

• Added support for WP_CACHE_KEY_SALT allowing multiple sites to use the same Memcached server.

0.1.2

• Allows graceful fallback to database object cache in WordPress 3.7+ for users without PECL Memcached available.
• Fixes warning due to replace() call, as it does not take a compression argument in Memcached.

0.1.1

• Fixes a problem with the get_option() function and the return value of wp_cache_get() on Linux

0.1

• Initial release

1. Install memcached on at least one server. Note the connection info. The default is 127.0.0.1:11211.

2. Install the PECL memcached extension

3. Copy object-cache.php to wp-content