Linux/MacOSX/FreeBSD: Support mounting partially encrypted system partitions/drivers in ReadOnly mode in order to allow troubleshooting in some cases.

src/Core/Unix/Linux/CoreLinux.cpp

@@ -313,6 +313,7 @@ namespace VeraCrypt
 		if (options.NoKernelCrypto
 			|| !xts
 			|| algoNotSupported
+			|| volume->IsEncryptionNotCompleted ()
 			|| volume->GetProtectionType() == VolumeProtection::HiddenVolumeReadOnly)
 		{
 			throw NotApplicable (SRC_POS);