RALEIGH, N.C. — Tuukka Rask is stopping just about any puck playoff opponents can shoot his way — even the ones he doesn’t see. The goaltender has been dominant in the Boston Bruins’ six-game postseason winning streak that has them on the doorstep of the Stanley Cup Final. Just don’t expect him to make any grand declaration of being “in the zone” as he makes stop after stop in these playoffs. He’s confident and comfortable.