GAINESVILLE, Fla. — The first boos poured down came as Florida quarterback Graham Mertz stood and did nothing. Trailing by two touchdowns near the end of Saturday’s first half, Gators coach Billy Napier had ordered his offense to stand down and let the final 35 seconds tick off the clock. This probably was the prudent football move, but the fans at The Swamp — whose ears had been filled with false promises since last year’s 5-7 team went home the Saturday after Thanksgiving — couldn’t take it. The boos served as a protest: At least try. But Napier opted not to try. And after a 41-17 beatdown b…