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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L2323: 	NFT_CT_SRC_IP                     = 0x13

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