Implement detection of volumes with vulnerable XTS master key.

If vulnerability detected, a warning message is displayed during mount or backup/restore header, and changing the password is disallowed since it will not change the master key.

src/Common/Crypto.h

@@ -277,6 +277,8 @@ typedef struct CRYPTO_INFO_t
 
 	uint32 SectorSize;
 
+	BOOL bVulnerableMasterKey; // TRUE if XTS primary key is identical to secondary key (i.e. the volume is vulnerable to attack on XTS mode)
+
 #endif // !TC_WINDOWS_BOOT
 
 	UINT64_STRUCT VolumeSize;