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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L1703: 	IFLA_BRPORT_MCAST_N_GROUPS                 = 0x29

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