Burundi’s long-serving President Pierre Nkurunziza promised on Thursday to step down when his term ends in 2020, easing fears of fresh violence in the impoverished country. #Burundi’s president says will not seek re-election, easing unrest fears https://t.co/yndB64L51P — Reuters Africa (@ReutersAfrica) June 7, 2018 Nkurunziza had been widely expected to take advantage of recent changes…