HEREWARD HOLLAND CONGO Republic voted for president on Sunday, with the incumbent Denis Sassou Nguesso widely expected to extend his 36-year rule despite an economic crisis in the Central African oil producer. The president's main rival, former government minister Guy-Brice Parfait Kolelas, who was in hospital with COVID-19 died during a medical evacuation to France. Even so, the government appeared to be leaving nothing to chance. There was an internet blackout across the country on Sunday, according to internet monitor NetBlocks. Sassou, a 77-year old former paratrooper, rose to power in 1979. He lost Congo's first multi-party elections in 1992…