Lindsey Buckingham, at 72, still has cheekbones that cast shadows. He has the upright shock of hair, too, though now it makes him look less like the kohl-eyed pop god of 1980 and more like Malcolm Gladwell’s cooler, angrier brother. He still has fire, too. A couple of solo renditions of Fleetwood Mac songs won the crowd over, but it was the following run of three numbers from his newest album, played with his three-piece band, that put the spark to the show.