The bespectacled face of Mustapha Limam Chafi, with his trademark round gold-rimmed glasses, is a familiar sight at all the grand hotels along Doha's waterfront promenade, from the Saint-Regis to the Shangri-La, and the W. Every two months, the Mauritanian-born diplomat is invited by the Qatari monarch to stay, all expenses paid, in return for his counsel. The man who had served as the imperturbable diplomatic advisor to the former Burkinabe president Blaise Compaore now instructs all those who meet