const archive/zip.directory64EndLen

4 uses

	archive/zip (current package)
		reader.go#L563: 	buf := make([]byte, directory64EndLen)
		struct.go#L47: 	directory64EndLen        = 56         // + extra
		writer.go#L156: 		var buf [directory64EndLen + directory64LocLen]byte
		writer.go#L161: 		b.uint64(directory64EndLen - 12) // length minus signature (uint32) and length fields (uint64)