consistently name the ifnet * that refers to the parent interface ifp0, and the ifnet * that refers to the carp interface ifp.
consistently name the ifnet * that refers to the parent interface
ifp0, and the ifnet * that refers to the carp interface ifp.

this makes it easier for me to read. it's probably not the right
name for ifp0, but at least it's consistent.

ok sthen@ bluhm@ mpi@ claudio@

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