Requested in https://github.com/systemd/systemd/issues/13233#issuecomment-
630800112.
* systemd-networkd's TUN support gained a new setting VnetHeader= for
tweaking Generic Segment Offload support.
+ * The address family for policy rules may be specified using the new
+ Family= option in the [RoutingPolicyRule] section.
+
* networkctl gained a new "delete" command for removing virtual network
devices, as well as a new "--stats" switch for showing device
statistics.