Photo: Clive Arrowsmith/Camera Press/Redux The re-emergence of singer Marianne Faithfull in 1979 was one of the most striking second acts in the history of pop music. For her album of that year, Broken English, she collected a suite of songs that mapped out a corrosive, unsparing and highly personal journey through some of the 20th century's most toxic realms - celebrity and heroin addiction, sexism and self-destruction. Faithfull was a beautiful pop star at the height of the '60s rock era, known across the world for her hits (notably the classic ballad "As Tears Go By") and her . . .