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/XML/include/Poco/DOM/DTDMap.h

@@ -0,0 +1,67 @@
+//
+// DTDMap.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOM
+//
+// Definition of the DTDMap class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_DTDMap_INCLUDED
+#define DOM_DTDMap_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/DOM/NamedNodeMap.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class DocumentType;
+
+
+class XML_API DTDMap: public NamedNodeMap
+	/// This implementation of NamedNodeMap
+	/// is returned by DocumentType::entities()
+	/// and DocumentType::notations(). 
+{
+public:
+	Node* getNamedItem(const XMLString& name) const;
+	Node* setNamedItem(Node* arg);
+	Node* removeNamedItem(const XMLString& name);
+	Node* item(unsigned long index) const;
+	unsigned long length() const;
+
+	Node* getNamedItemNS(const XMLString& namespaceURI, const XMLString& localName) const;
+	Node* setNamedItemNS(Node* arg);
+	Node* removeNamedItemNS(const XMLString& namespaceURI, const XMLString& localName);
+
+	void autoRelease();
+
+protected:
+	DTDMap(const DocumentType* pDocumentType, unsigned short type);
+	~DTDMap();
+
+private:
+	DTDMap();
+	
+	const DocumentType* _pDocumentType;
+	unsigned short _type;
+	
+	friend class DocumentType;
+};
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_DTDMap_INCLUDED