PHILADELPHIA — Dave Schultz would drop his gloves in a flash, his bare fists pummeling away at unprotected faces in fits of fury so ferocious that he became known as “The Hammer.” Schultz was the intimidating backbone of Philadelphia’s “Broad Street Bullies” teams of the 1970s that won a pair of Stanley Cup championships. The Flyers’ rugged style of play became their calling card, and rare was the NHL team that didn’t have a tough guy or two whose primary role was to …