chang slot

get-active-boot-slot - Prints the SLOT to load on next boot. wingsfly slot set-active-boot-slot SLOT - On next boot, load and execute SLOT set-slot-as-unbootable SLOT - Mark SLOT as invalid is-slot-bootable SLOT - Returns 0 only if SLOT is bootable is-slot-marked-successful SLOT - Returns 0 only if SLOT is marked GOOD