Austin Reaves has a duality about him.  He’s goofy, self-deprecating and humble. He’s a country boy from Newark, Arkansas, a town with a population of fewer than 2,000. He’s a star who still grapples with being a star. He has impostor syndrome even though he’s on the verge of a maximum contract. But he’s also supremely confident — or, as he describes it, he has “delusional confidence.”  When Lakers coach JJ Redick asked him to do the nearly impossible Saturday against the Nuggets, that wavered