The U.N. Security Council renewed a peacekeeping mission in South Sudan for a second year on Thursday as U.N. Secretary-General Ban Ki-moon warned the future of the year-old state was tied to developing good relations with former civil war foe Sudan, dpa reported. The U.N. mission in South Sudan, known as UNMISS, was created after South Sudan seceded from Sudan in July 2011, six months after a referendum agreed under a 2005 peace deal that ended decades of civil war that killed some 2 million people.