PREEMPTION kernel option added, ucycom(4) for Cypress CY7C637xx and CY7C640/1xx families of USB to RS232 bridges added, debug.witness_* tunable renamed to debug.witness.*, vge(4) for VIA VT6122 gigabit ethernet chip added, and mkuzip(8) for GEOM_UZIP added. Update release notes: remove %include.historic; section for now, 4BSD is the default schedular now, and update links to sound(4)-related manual pages.