DAVOS, Switzerland (Reuters) - Libyan leader Muammar Gaddafi's politically influential son said on Thursday that armed resistance to U.S.-led multinational forces in Iraq was legitimate but condemned the killing of innocent hostages. Seif al-Islam Gaddafi said U.N. Secretary-General Kofi Annan had called the war in Iraq illegal, key members of the Security Council had opposed it and the failure to find weapons of mass destruction -- the main reason Washington gave for invading Iraq -- removed any moral justification for military action. "The result is clear -- that it's an illegal occupation and therefore people should resist it," Gaddafi...