Actually, for 4.6, for OpenShift SDN, we didn't backport the treating of openshift-host-network namespace as the one to use for ingress traffic. Neither did we update the openshift-ingress namespace to carry the new label. So may be the 4.6 documentation is OK as is. But for 4.7 and 4.8 we want to have folks use the new labels consistently across both SDN and OVN-K.