The Kenyan High Court has approved the use of military force to restore order, following days of anti-tax protests that at some point overwhelmed police.More than 20 people have reportedly been killed in the nationwide protests that are largely led by young people opposed to government plans to increase taxes.Armoured military vehicles patrolled streets in the capital, Nairobi, on Thursday as police fired tear gas to disperse protesters, who had threatened to storm the presidential palace.A judge said that the military deployment was critical to protect government installations but gave…