Clashes in Libya spread from Tripoli to the western town of Zawiya near Tunisia's border, where a large oil port is located, killing four people over the last two days, local town council officials said on Thursday. Foreign governments have mostly closed their embassies and evacuated staff after three weeks of clashes turned Libya's two main cities - Tripoli and Benghazi - into warzones in the worst fighting since the NATO-backed war against Muammar Gaddafi. Three years after Gaddafi's fall…