The season of good will? Already? What happened to the last year? Ah, the days may spin faster, but our annual guide to holiday stage entertainment is as reliable as Christmas pudding. One rule: These have to be genuinely holiday-themed shows. And, no,"Hellcab," as much as we love you, a Christmas Eve setting does not count. — Chris Jones PLUS DOZENS MORE SHOWS AND CONCERTS by Kerry Reid. ADD TO OUR LIST ON THEATER LOOP CHAT: Do you have a favorite? Or are you putting on a holiday show? Tell us.