CHAMAN, Pakistan, Aug 9 (Reuters) - A rift has emerged in the ranks of Afghanistan's ousted Taliban militia, with members of the breakaway faction saying they no longer recognise fugitive leader Mullah Mohammad Omar. Sabir Momin, who was the Taliban's deputy operations commander in southern Afghanistan, said on Monday the dissident group is named Taliban Jamiat Jaish-e-Muslimeen (Muslim Army of the Taliban). Momin told Reuters the faction had the support of about one third of Taliban fighters, and did not recognise the one-eyed Mullah Omar, one of the world's most wanted men for helping shelter Osama bin Laden and...