Apple has released iTunes 12.6 with minor bug fixes and one big new feature: The ability to rent movies in iTunes and watch them on other devices running iOS 10.3 or tvOS 10.2. The wording in the release notes isn’t specific, but hints at the ability to simply stream a rented movie on any device linked to the Apple ID that rented it. Previously users have always had to actually transfer the rented file from one device to another and could only…