Swiss federal prosecutors say they have referred former Syrian Vice President Rifaat Assad, the uncle of the war-battered country’s current president, for trial on charges of war crimes and crimes against humanity for allegedly ordering murder and torture more than four decades ago. The attorney general’s office said Tuesday that Assad, 86, is accused of ordering the crimes in Syria in February 1982 while serving as commander of defence brigades that carried out an attack in the city of Hama during a conflict between the military and the Islamist opposition. Security forces killed thousands to…