PARIS, Oct 12 (Reuters) - A former French ambassador to the United Nations appeared before a judge on Wednesday in connection with an inquiry into corruption linked to the U.N.-run oil-for-food programme in Iraq, a judicial source said. Jean-Bernard Merimee, detained on Monday over allegations that he may have benefited from oil allocated under the programme by former Iraqi President Saddam Hussein, could face charges of corruption and corruption of foreign public servants. He is one of almost a dozen French political, diplomatic and other personalities whom judge Philippe Courroye has questioned or wants to question over the oil-for-food programme....