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/DocumentEvent.h

@@ -0,0 +1,65 @@
+//
+// DocumentEvent.h
+//
+// Library: XML
+// Package: DOM
+// Module:  DOM
+//
+// Definition of the DOM DocumentEvent interface.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOM_DocumentEvent_INCLUDED
+#define DOM_DocumentEvent_INCLUDED
+
+
+#include "Poco/XML/XML.h"
+#include "Poco/XML/XMLString.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+class Event;
+
+
+class XML_API DocumentEvent
+	/// The DocumentEvent interface provides a mechanism by which the user can create
+	/// an Event of a type supported by the implementation. It is expected that
+	/// the DocumentEvent interface will be implemented on the same object which
+	/// implements the Document interface in an implementation which supports the
+	/// Event model.
+{
+public:
+	virtual Event* createEvent(const XMLString& eventType) const = 0;
+		/// Creates an event of the specified type.
+		///
+		/// The eventType parameter specifies the type of Event interface to be created.
+		/// If the Event interface specified is supported by the implementation this
+		/// method will return a new Event of the interface type requested. If the Event
+		/// is to be dispatched via the dispatchEvent method the appropriate event init
+		/// method must be called after creation in order to initialize the Event's
+		/// values. As an example, a user wishing to synthesize some kind of UIEvent
+		/// would call createEvent with the parameter "UIEvents". The initUIEvent method
+		/// could then be called on the newly created UIEvent to set the specific type
+		/// of UIEvent to be dispatched and set its context information.
+		/// The createEvent method is used in creating Events when it is either inconvenient
+		/// or unnecessary for the user to create an Event themselves. In cases where
+		/// the implementation provided Event is insufficient, users may supply their
+		/// own Event implementations for use with the dispatchEvent method.
+
+protected:
+	virtual ~DocumentEvent();
+};
+
+
+} } // namespace Poco::XML
+
+
+#endif // DOM_DocumentEvent_INCLUDED