Headliners for the 2022 Jacksonville Jazz Festival have been announced. Back is guitar-phenom George Benson. Youngsters like 30-year-old vocalist and songwriter Jazzmeia Horn, as well as 32-year-old pianist and composer Christian Sands are on the bill. Local drummer and bandleader John Lumpkin will performa as well. But the big news: Herbie Hancock. A multi-instrumentalist and architect of post-bop best known …