Crypto: deprecate GOST89 so that it can't be used to create new volumes. Keep only for existing volumes.

src/Common/Crypto.c

@@ -79,7 +79,7 @@ static EncryptionAlgorithm EncryptionAlgorithms[] =
 	{ { TWOFISH,					0 }, { XTS, 0 },	1, 1 },
 	{ { CAMELLIA,					0 }, { XTS, 0 },	1, 1 },
 #if defined(CIPHER_GOST89)
-	{ { GOST89,						0 }, { XTS, 0 },	0, 1 },
+	{ { GOST89,						0 }, { XTS, 0 },	0, 0 },
 #endif  // defined(CIPHER_GOST89)
 	{ { KUZNYECHIK,				0 }, { XTS, 0 },	0, 1 },
 	{ { TWOFISH, AES,				0 }, { XTS, 0 },	1, 1 },

src/Volume/EncryptionAlgorithm.cpp

@@ -298,7 +298,7 @@ namespace VeraCrypt
 
 	
 	// GOST89
-	GOST89::GOST89 ()
+	GOST89::GOST89 () : Deprecated (true)
 	{
 		Ciphers.push_back (shared_ptr <Cipher> (new CipherGost89()));