Fix linker definition clashes between libargon2 and libsodium on Windows

src/crypto/argon2/argon2.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2018 KeePassXC Team <team@keepassxc.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 or (at your option)
+ * version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_CRYPTO_ARGON2_H
+#define KEEPASSXC_CRYPTO_ARGON2_H
+
+/*
+    Argon2 wrapper header with redefined symbols to be used with the
+    patched libargon2 binary which is generated by the build system.
+    This is to avoid link-time definition clashes with libsodium on Windows.
+ */
+
+#ifdef Q_OS_WIN
+#define argon2_hash libargon2_argon2_hash
+#define argon2_error_message libargon2_argon2_error_message
+#endif
+
+#include <argon2.h>
+
+#endif //KEEPASSXC_CRYPTO_ARGON2_H

src/crypto/kdf/Argon2Kdf.cpp

@@ -18,8 +18,8 @@
 #include "Argon2Kdf.h"
 
 #include <QtConcurrent>
-#include <argon2.h>
 
+#include "crypto/argon2/argon2.h"
 #include "format/KeePass2.h"
 
 /**