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/Net/src/NullPartHandler.cpp

@@ -0,0 +1,46 @@
+//
+// NullPartHandler.cpp
+//
+// Library: Net
+// Package: Messages
+// Module:  NullPartHandler
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Net/NullPartHandler.h"
+#include "Poco/Net/MessageHeader.h"
+#include "Poco/NullStream.h"
+#include "Poco/StreamCopier.h"
+
+
+using Poco::NullOutputStream;
+using Poco::StreamCopier;
+
+
+namespace Poco {
+namespace Net {
+
+
+NullPartHandler::NullPartHandler()
+{
+}
+
+
+NullPartHandler::~NullPartHandler()
+{
+}
+
+
+void NullPartHandler::handlePart(const MessageHeader& header, std::istream& stream)
+{
+	NullOutputStream ostr;
+	StreamCopier::copyStream(stream, ostr);
+}
+
+
+} } // namespace Poco::Net