A southern Illinois man is accused of threatening the life of a federal judge in Chicago, federal prosecutors announced Tuesday.Joshua Farner, 35, of Marion is facing two counts of mailing threats and one count of threatening to assault and murder a judge. The indictment accuses Farner of threatening to retaliate against the judge and impede, intimidate, and interfere with the judge’s official duties.The judge targeted by Farner wasn’t named in the announcement of the indictment by U.S. Attorney John R. Lausch, …