Tens of thousands of people in the Philippines may have been killed in the war on drugs since mid-2016, with “near impunity” for police and incitement to violence by top officials, the United Nations said on Thursday.The drugs crackdown, launched by President Rodrigo Duterte after winning election on a platform of crushing crime, has been marked by police orders and high-level rhetoric that may have been interpreted as “permission to kill”, it said.Duterte’s war on drugs is ‘large-scale…