I grew up near him and thought I knew what it would be, but a historian says a lot of us miss the point — Fifty years ago, Bruce Springsteen released his first album, “Greetings From Asbury Park, N.J.,” named for the beach town 20 minutes up the Garden State Parkway from my family’s summer house in the Pine Barrens. Every June, on the way to our place, we’d pass the Jersey Freeze stand in…