const golang.org/x/sys/unix.PACKET_VNET_HDR_SZ

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L2340: 	PACKET_VNET_HDR_SZ                          = 0x18

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)