Unbreak RTM_CHANGE. Unlike RTM_LOCK or RTM_GET it is OK to pass in a new gateway for RTM_CHANGE if the route is not a multipath route. Fixes issues found by benno@, OK benno@
Unbreak RTM_CHANGE. Unlike RTM_LOCK or RTM_GET it is OK to pass in a
new gateway for RTM_CHANGE if the route is not a multipath route.
Fixes issues found by benno@, OK benno@

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