Let uvm_map_extract set the lower bound on the address range itself instead of depending on the callers to do that. (which they don't)
Let uvm_map_extract set the lower bound on the address range itself
instead of depending on the callers to do that. (which they don't)

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars