Add current trunk version of object-cache.php from the WordPress.org repository.
Use the global $table_prefix in switch_to_blog()

When using batcache in combination with memcached object cache on a single site install, table_prefix is not available when switch_to_blog is called. This causes two versions of data to be stored in memcached.

By bringing in the global, we can be sure that table_prefix is consistent in both logged in and logged out states
Add a default port to the default memcached bucket

If memcached servers are not specified, a PHP notice can be generated after trying to access the non existent $port that should have been created when the bucket string was exploded into an array.

Adding a default port to the bucket avoids this error.
Stop tracking delete stats to avoid notices for a non existant key

Will investigate this closer later, but now. Meh.