Following a hit run Off-Broadway last year, Harvey Fierstein’s landmark gay play “Torch Song” is back on Broadway with an abridged text and title, but its heart and humanity intact.  On second viewing, this production feels more muted and a bit too comfortable, but the performances are richer and better, and the subject matter as timely as ever.  An uproarious comedy with a suite of characters you come to love, “Torch Song” is a must-see of the fall (or any) season.