It’s tempting to call Austin, Texas country-rocker Alejandro Escovedo the Forrest Gump of indie rock, but he deserves to be associated with a much better movie. In 1978, his first band, San Francisco punkers The Nuns, opened the last-ever Sex Pistols show prior to the Pistols’ brief mid-90s reunion. He was living in the Chelsea Hotel in New York City when the Pistol’s’ Sid Vicious and his girlfriend Nancy Spungen checked in; Spungen would…