Enable support for RX checksum offload, RX VLAN tag stripping and TX VLAN tag insertion.
Enable support for RX checksum offload, RX VLAN tag stripping and TX
VLAN tag insertion.

ok jsg@

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