ABDI SHEIKH RESIDENTS of Mogadishu have fled some neighbourhoods, fearing fresh clashes between rival factions in Somalia's security forces, in a row about presidential term limits that has fuelled worries the country could return to all-out war. Government forces also raided an independent radio station and confiscated equipment. Forces loyal to the opposition hold parts of the city and the two sides clashed over the weekend, raising fears that al Qaeda-linked al Shabaab insurgents could exploit a security vacuum as state forces turn on each other. The unrest is the second bout of violence in Mogadishu over an extension to…