NICK KREWEN Eric Clapton calls him “by far and without a doubt the best guitar player alive.” Late virtuosos Jimi  Hendrix and Stevie Ray Vaughan idolized him, and he used to trade licks with Chicago blues legends Muddy Waters, Howlin’ Wolf and Willie Dixon. Yet it’s the fans that dictate Buddy Guy‘s agenda — even if it means entertaining them in sub-zero degree weather. “I played for people outside last…