As part of her first tour post-prison release, Ms. Lauryn Hill returned to Washington, DC last night for a sold-out show at the Lincoln Theatre. From the sound of it, if nothing else, her musical talent is certainly rehabilitated. If what you wanted was to be transported to 1998, tough luck. From the moment she sang the first note of her opening number- some two-and-a-half hours after doors opened- Ms. Hill made it clear she was…