Michael Savage, the conservative badboy shockjock whom progressives love to hate, is returning to the airwaves of the Bay Area next week -- with his debut on a local all-sports sports station. Savage will debut on 50,000 watt KTRB-AM, which is known as XTRA Sports 860 AM, beginning Feb. 1, he says. He was a fixture on KSFO-AM until 2003 and after that on KNEW-AM -- but he was dropped last September after managers said the station was "headed in a new direction." Savage, a resident of San Francisco, was asked about the change by Chronicle comrade Joe Garofoli in...