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

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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L6191: 	FRA_IP_PROTO           = 0x16

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