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/EventException.h

@@ -0,0 +1,81 @@
+//
+// EventException.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOMEvents
+//
+// Definition of the DOM EventException class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_EventException_INCLUDED
+#define DOM_EventException_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/XML/XMLException.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class XML_API EventException: public XMLException
+	/// Event operations may throw an EventException as 
+	/// specified in their method descriptions.
+{
+public:
+	enum
+	{
+		UNSPECIFIED_EVENT_TYPE_ERR = 0  /// If the Event's type was not specified by initializing the 
+		                                /// event before the method was called. Specification of the Event's
+                                        /// type as null or an empty string will also trigger this exception. 
+	};
+
+	EventException(int code);
+		/// Creates an EventException with the given error code.
+
+	EventException(const EventException& exc);
+		/// Creates an EventException by copying another one.
+
+	~EventException() noexcept;
+		/// Destroys the EventException.
+
+	EventException& operator = (const EventException& exc);
+
+	const char* name() const noexcept;
+		/// Returns a static string describing the exception.
+
+	const char* className() const noexcept;
+		/// Returns the name of the exception class.
+
+	unsigned short code() const;
+		/// Returns the Event exception code.
+
+protected:
+	Poco::Exception* clone() const;
+	
+private:
+	EventException();
+};
+
+
+//
+// inlines
+//
+inline unsigned short EventException::code() const
+{
+	return UNSPECIFIED_EVENT_TYPE_ERR;
+}
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_EventException_INCLUDED