When purging the routes corresponding to an ifp, skip the routing tables of different routing domains.
When purging the routes corresponding to an ifp, skip the routing tables
of different routing domains.

The same change has been applied to rt_if_track() in r1.205.

ok claudio@

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