GABORONE, Botswana – Zimbabwean president Emmerson Mnangagwa on Thursday said he had “agreed” with his Botswana counterpart President Mokgweetsi Masisi to open up their borders for passport-free travel by their citizens. Mnangagwa said the terms of the agreement will be be hammered out by officials from both countries. “I have been talking to my brother here (Masisi) after he was making a…