(Reuters) - The self-declared Libyan National Army led by a renegade general told civilians on Saturday to leave parts of Benghazi before it launched a fresh attack on Islamist militants, a day after dozens were killed in the worst clashes in the city for months. Families could be seen packing up and driving away from western districts of the port city where Islamist militants and LNA forces led by retired General Khalifa Haftar fought for hours on Friday. Dressed in military uniform, Hafter - whom the speaker of parliament accused of plotting a coup - said his troops had temporarily...