Smarter Client Updates

For self hosted SC servers, we need much smarter client update options. Either, the ability to rate limit the number of clients being updated concurrently (so they can be queued) or the ability to pull the updated client from an external source. Trying to update 400 odd clients over a DSL connection is a nightmare and takes us weeks to complete because we can only do a few at a time without our uplink being congested.