As a show of false modesty, President Paul Kagame’s New Year address to the people of Rwanda was hard to beat. Under the little matter of the law, this tough and acutely intelligent former rebel leader should have been preparing to hand over power.The version of the constitution passed in 2003 compelled Kagame to step down in 2017 after his second and final term as president. But African leaders are not noted for their willingness to relinquish office, particularly if – like Kagame – they fought their way to power in the blood-soaked aftermath of a genocide in 1994.So this headstrong leader pulled off an old trick. In November, he staged a referendum on whether to rewrite the constitution to extend his rule. The contest was called at 10 days’ notice in a country wh