UPDATE 1-CANADA STOCKS-TSX ends at 3-week high; oil gains lift energy stocks

(Adds details, updates to close) TORONTO, Feb 23 (Reuters) - Canada's main stock index closed at a three-week high on Friday, with energy companies leading gains across the board on higher oil prices. * The Toronto Stock Exchange's S&P/TSX composite index rose 130.28 points, or 0.84 percent, to 15,638.45. * The energy group gained 1.5 percent. * Energy-related companies Enerplus Corp , CES Energy Solutions Corp and Enerflex Ltd were amo