MATHATHA TSEDU THE picture has become as iconic as the one of the battered face of Steve in the coffin. But this is one of supreme defiance. The scene is Bantu Biko’s funeral on September 25, 1977, in Ginsberg outside King Williamstown. In it, Kenny Hlako(correct) Rachidi, clad in a long gold dashiki and a necklace, stands with a raised clenched right-hand fist, the left hand pulling up the long dashiki. The fist seems to touch the banner behind him, a banner of the Black People’s Convention (BPC), with its signature emblem of two chained hands with the chain however…