NEW YORK—Kevin Durant has always been one of the NBA’s most unstoppable scorers. The Brooklyn Nets needed much more than points Tuesday night, so Durant gave them one of the most spectacular performances in postseason history. Durant had 49 points, 17 rebounds, and 10 assists, sending the Nets back into the lead in the Eastern Conference semifinals with a 114–108 victory over the Milwaukee Bucks in Game 5. “I know the perception of me is that I can score the basketball well, but any team that I’ve played on, I’ve been asked to do pretty much everything from rebounding to defending to initiating to scoring,” Durant said. “I might not do it all the time but I do a little bit of everything.” In Game 5, it was a whole lot of everything. The two-time NBA Finals MVP became the first player to have at least 45 points, 15 rebounds, …