Before he was in Sugar or became the Drive-By Truckers’ producer-of-choice throughout their career, David Barbe led the Athens, GA trio Mercyland, who made one minor classic with 1989’s No Feet On the Cowling. The locals at that time with whom they most identified were Bar-B-Q Killers, Jack-O-Nuts, Liquor Cabinet (Jack Logan), the Primates, Skin Pops, Eat America, and Time Toy. Barbe …