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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L1011: 	CTRL_ATTR_MCAST_GROUPS     = 0x7

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