Hello there!
I have worked with WoW private servers for a very short time. However i have worked with garrymod servers. (a game thats a mod of the half life series.) and with the garrysmod server the addons were placed in a certain folder. To update these addons you would use an SVN updater to get you the most recent stuff and best working models. However i was curious, are there any repacks out there that use SVN to update their mysql databases? and if they do use SVN do they update often?