References: golang.org/x/sys/unix.NFTA_MATCH

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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L2319: 	NFTA_MATCH_UNSPEC  = 0x0

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)