Queer life in Kenya doesn’t get much attention, but How to Live, film-maker Njoroge Muthoni’s thought-provoking new documentary on Nairobi’s vibrant ballroom, drag and queer cabaret scene, may change that. The film’s world premiere is at this month’s BFI Flare Film Festival in London. Muthoni follows a large group of Nairobi’s queer performers, entertainers…