The United Nations’ special rapporteur on human rights in Afghanistan said Wednesday the Taliban’s ban on him entering the country sent a troubling signal about their engagement with the wider world. Richard Bennett called the ban a retrograde step that should be reversed but vowed he would continue to document human rights violations in Afghanistan. “The Taliban’s public announcement that they will no longer grant me access to Afghanistan is a step backwards and sends a concerning signal about their engagement with the United Nations and the international community on human rights,” he said i…