SOUTH BEND, Ind. — It was nearly midnight when the door to the visiting media room flew open and in walked Indiana head coach Curt Cignetti, the ripsnorting rabble-rouser whose trophy cabinet is bursting with national honors after guiding the Hoosiers to their best season in school history, a turnaround that will never be forgotten. Hours earlier, before the snow in Notre Dame Stadium had fully melted, Cignetti appeared on the set of “College Gameday” and ignited social media with his latest batch of cocksure comments. Sandwiched between the legendary Nick Saban and former NFL punter Pat McAfee, now a prominent personality at ESPN, Cignetti declared that programs he’s coached “don’t just beat top-25 teams, we beat the s— out of them.” At which…