text:  Shopping for a car today? It could take a while for the dealer to help you. Welcome to the new Nissan of Rochester. While some U.S. car dealerships are back online, as many as half are still logging their sales the old-fashioned way, handwriting them with computers on the fritz after a hack at software firm CDK. Analysts tell the Wall Street Journal the disruptions could lower sales estimates for the month by as much as 10 percent. But if things normalize soon, per