Memcached delivery-cache for Openads

I just submitted a patch for the Openads Project to add Memcached delivery-cache. This patch greatly increase deliver-cache performance over using the database, and almost completely eliminates SELECT queries to the database during delivery.

If you're using Openads (or PhpAdsNew 2.0.7 and above) you should be able to easily integrate this patch until it's in the main release(s).