const io/fs.ModeSocket

5 uses

	io/fs (current package)
		fs.go#L181: 	ModeSocket                                     // S: Unix domain socket
		fs.go#L189: 	ModeType = ModeDir | ModeSymlink | ModeNamedPipe | ModeSocket | ModeDevice | ModeCharDevice | ModeIrregular

	archive/zip
		struct.go#L341: 	case fs.ModeSocket:
		struct.go#L378: 		mode |= fs.ModeSocket

	os
		types.go#L45: 	ModeSocket     = fs.ModeSocket     // S: Unix domain socket