Q: I am completely confused about this new Family Sharing thing in the latest iOS. As I understood it, it was supposed to let me share my stuff with my wife and kids, but trying to set it up has actually been a mess. Before, everyone shared my iTunes account, and things kind of worked pretty well that way, although I wasn’t crazy about my kids having my password, so I tended to have to download stuff for them. The idea that we could all use…