CENTRAL African Republic's army, backed by Russian and Rwandan allies, regained control yesterday of the rebel stronghold of Bossangoa, extending a series of victories over an insurgency that had recently overrun the town, the government said. A surge in violence linked to a disputed December 27 presidential election has forced more than 200,000 civilians to flee their homes, stalled flows of food and driven up prices for basic goods. Rebels aligned with former president Francois Bozize seized Bossangoa, his hometown 260 km (160 miles) northwest of the capital Bangui, and several other towns after the constitutional court barred his candidacy…