Add missing copyright

src/protocol.h

@@ -1,8 +1,8 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
 // Copyright (c) 2009-2013 The Bitcoin Core developers
+// Copyright (c) 2016-2021 The Hush developers
 // Distributed under the GPLv3 software license, see the accompanying
 // file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
-
 /******************************************************************************
  * Copyright © 2014-2019 The SuperNET Developers.                             *
  *                                                                            *
@@ -17,7 +17,6 @@
  * Removal or modification of this copyright notice is prohibited.            *
  *                                                                            *
  ******************************************************************************/
-
 #ifndef __cplusplus
 #error This header can only be compiled as C++.
 #endif