COLUMBUS, Ohio — Since the start of the season, the Flyers’ mortal enemy has been the second period They’ve allowed 83 goals in the middle frame (6th most in the NHL) while scoring just 62 (5th fewest). But Thursday night at Nationwide Arena against the Columbus Blue Jackets, the Flyers turned that narrative on its head, scoring three unanswered goals in the second period to secure a 4-1 win. Defenseman Kevin Connauton, winger Owen Tippett, winger Noah Cates, and winger Travis Konecny led the offensive attack, tallying goals to help the Flyers to their second straight road win. The Flyers were…