FRIEND$ AT THE TOP: Former President Bill Clinton and British ex-Prime Minister Tony Blair both sit on the advisory board of Teneo Holdings, which was paid at least $625,000 to do public-relations and financial-consulting work for Jon Corzine’s failed brokerage, MF Global. ....Clinton spokesman Matt McKenna said “President Clinton does not advise clients on the firm’s behalf.” Clinton does make money from Teneo, but has declined to disclose the sum. Corzine and the former president have been close for years. Clinton campaigned for Corzine repeatedly and Corzine, in turn, became the first sitting governor to endorse Hillary Rodham Clinton’s bid...