​There's a ghost living at 2601 Holmes. He has a name -- Radar -- and a distinctive aroma. "You know he's in the room when you smell a lit cigarello. That's what he used to smoke when he was alive and hanging out at the Dutch Hill Bar & Grill," says restaurateur Beth Barden, who has spent the last six months turning the long-vacant saloon into her new Succotash restaurant. The old Succotash, in the City Market, closed on November 1. Barden unlocked the hand-made door to the new D