By C. Bryson Hull NAIROBI (Reuters) - Letting non-African troops into Sudan's troubled Darfur region risks creating turmoil like that seen after the U.S. invasion of Iraq, Sudan's president said on Monday. Despite the widespread view that an African Union (AU) peacekeeping force had done little to quell violence in Darfur, President Omar al-Bashir argued it was doing its job well and needed no outside help. Sudan has rejected a push for a United Nations-led peacekeeping force in Darfur until it signs a peace agreement with rebel groups it is fighting there. AU-led peace talks are underway in Abuja, Nigeria....