SEOUL (Reuters) - South Korean President Moon Jae-in and his U.S. counterpart Donald Trump agreed on Monday to scrap a warhead weight limit on South Korea’s missiles in the wake of North Korea’s sixth nuclear test, South Korea’s presidential office said. In a separate phone call with Russian President Vladimir Putin also on Monday, Moon said the U.N. Security Council should seek ways to sever North Korea’s foreign currency income, including from its workers employed abroad and oil shipments. Under the existing missile pact between the United States and South Korea, Seoul’s warheads currently face a cap of 500 kg...