THE South African unit of Unilever will set up an advisory board and a diversity committee after apologising for a hair care advert which it admitted was "racist", the consumer group has announced. The advert by its TRESemmé brand was posted on drugstore Clicks Group's website last Friday, and described images of African black hair as "frizzy and dull," while a white woman's hair was referred to as "normal". It caused an outcry on social media and sparked protests led by the opposition Economic Freedom Fighters (EFF) in a country where unfair treatment of black hair evokes painful memories of…