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/Notation.h

@@ -0,0 +1,93 @@
+//
+// Notation.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOM
+//
+// Definition of the DOM Notation class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_Notation_INCLUDED
+#define DOM_Notation_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/DOM/AbstractNode.h"
+#include "Poco/XML/XMLString.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class XML_API Notation: public AbstractNode
+	/// This interface represents a notation declared in the DTD. A notation either
+	/// declares, by name, the format of an unparsed entity (see section 4.7 of
+	/// the XML 1.0 specification <http://www.w3.org/TR/2004/REC-xml-20040204/>), 
+	/// or is used for formal declaration of processing
+	/// instruction targets (see section 2.6 of the XML 1.0 specification).
+	/// The nodeName attribute inherited from Node is set to the declared name of
+	/// the notation.
+	/// 
+	/// The DOM Level 1 does not support editing Notation nodes; they are therefore
+	/// readonly.
+	/// 
+	/// A Notation node does not have any parent.
+{
+public:
+	const XMLString& publicId() const;
+		/// Returns the public identifier of this notation.
+		/// If not specified, this is an empty string (and not null,
+		/// as in the DOM specification).
+
+	const XMLString& systemId() const;
+		/// Returns the system identifier of this notation.
+		/// If not specified, this is an empty string (and not null,
+		/// as in the DOM specification).
+
+	// Node
+	const XMLString& nodeName() const;
+	unsigned short nodeType() const;
+
+protected:
+	Notation(Document* pOwnerDocument, const XMLString& name, const XMLString& publicId, const XMLString& systemId);
+	Notation(Document* pOwnerDocument, const Notation& notation);
+	~Notation();
+	
+	Node* copyNode(bool deep, Document* pOwnerDocument) const;
+
+private:
+	XMLString _name;
+	XMLString _publicId;
+	XMLString _systemId;
+	
+	friend class Document;
+};
+
+
+//
+// inlines
+//
+inline const XMLString& Notation::publicId() const
+{
+	return _publicId;
+}
+
+
+inline const XMLString& Notation::systemId() const
+{
+	return _systemId;
+}
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_Notation_INCLUDED