Chris Willman Music WriterNo false advertising anywhere on the cover of the newest entry in Bob Dylan’s “Bootleg Series” about which era is being covered. The boxed set’s subtitle lays out the dates — 1980-85 — but even before you land on the fine print, there’s the period-specificity of the cover photo, a vintage Ken Regan shot of a suave Dylan with his shirt seductively unbuttoned to give us just a little then-de-rigueur chest-hair action.