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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L1789: 	IFLA_VXLAN_COLLECT_METADATA                = 0x19

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