Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/MongoDB/include/Poco/MongoDB/Message.h

@@ -0,0 +1,73 @@
+//
+// Message.h
+//
+// Library: MongoDB
+// Package: MongoDB
+// Module:  Message
+//
+// Definition of the Message class.
+//
+// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef MongoDB_Message_INCLUDED
+#define MongoDB_Message_INCLUDED
+
+
+#include "Poco/Net/Socket.h"
+#include "Poco/BinaryReader.h"
+#include "Poco/BinaryWriter.h"
+#include "Poco/MongoDB/MongoDB.h"
+#include "Poco/MongoDB/MessageHeader.h"
+#include <sstream>
+
+
+namespace Poco {
+namespace MongoDB {
+
+
+class MongoDB_API Message
+	/// Base class for all messages send or retrieved from MongoDB server.
+{
+public:
+	explicit Message(MessageHeader::OpCode opcode);
+		/// Creates a Message using the given OpCode.
+	
+	virtual ~Message();
+		/// Destructor
+
+	MessageHeader& header();
+		/// Returns the message header
+
+protected:
+	MessageHeader _header;
+
+	void messageLength(Poco::Int32 length);
+		/// Sets the message length in the message header
+};
+
+
+//
+// inlines
+//
+inline MessageHeader& Message::header()
+{
+	return _header;
+}
+
+
+inline void Message::messageLength(Poco::Int32 length)
+{
+	poco_assert(length > 0);
+	_header.setMessageLength(length);
+}
+
+
+} } // namespace Poco::MongoDB
+
+
+#endif // MongoDB_Message_INCLUDED