text: Iraqi Government, Al-Sadr OK Peace Deal NAJAF, Iraq - Iraq's top Shiite cleric, Grand Ayatollah Ali al-Sistani, made a dramatic return to Najaf on Thursday and swiftly won agreement from a rebel cleric and the government to end three weeks of fighting between his militia and U.S.-Iraqi forces.    The renegade Muqtada al-Sadr accepted the proposal in a face-to-face meeting Thursday night with the 75-year-old al-Sistani...