A post-hurricane Katrina album recorded in curfew-curtailed New Orleans could misfire. It could be a sappy, chest-beating piece of hookum. But then Greg Dulli, frontman of Ohio’s soul shouters Afghan Whigs, has never written hookum. His trade is messed-up relationships and late-night whispering. After three Twilight albums that never lived up to his previous might, he’s now hit paydirt.