PORT-AU-PRINCE (Reuters) -The United Nations Security Council on Friday said it had approved the addition of four suspected Haitian gang leaders to its sanctions list, a long-awaited addition as the Caribbean nation faces a worsening humanitarian crisis. The U.N. slapped sanctions on Renel Destina, believed to be the main leader of the Grand Ravine gang; as well as Vitel’homme Innocent, understood to head the Kraze Barye gang; Johnson Andre of 5 Segond; and Wilson Joseph of 400 Mawozo. The U.S. Treasury Department earlier on Friday announced fresh sanctions against the same four individuals. S…