refactor stackgap sysctl.  prompted by a bug report from Michael Coulter. ok deraadt@ markus@
refactor stackgap sysctl.  prompted by a bug report from Michael Coulter.
ok deraadt@ markus@

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