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/Foundation/include/Poco/PriorityEvent.h

@@ -0,0 +1,61 @@
+//
+// PriorityEvent.h
+//
+// Library: Foundation
+// Package: Events
+// Module:  PriorityEvent
+//
+// Implementation of the PriorityEvent template.
+//
+// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_PriorityEvent_INCLUDED
+#define Foundation_PriorityEvent_INCLUDED
+
+
+#include "Poco/AbstractEvent.h"
+#include "Poco/PriorityStrategy.h"
+#include "Poco/AbstractPriorityDelegate.h"
+
+
+namespace Poco {
+
+
+template <class TArgs, class TMutex = FastMutex> 
+class PriorityEvent: public AbstractEvent < 
+	TArgs,
+	PriorityStrategy<TArgs, AbstractPriorityDelegate<TArgs> >,
+	AbstractPriorityDelegate<TArgs>,
+	TMutex
+>
+	/// A PriorityEvent uses internally a PriorityStrategy which 
+	/// invokes delegates in order of priority (lower priorities first).
+	/// PriorityEvent's can only be used together with PriorityDelegate's.
+	/// PriorityDelegate's are sorted according to the priority value, when
+	/// two delegates have the same priority, they are invoked in
+	/// an arbitrary manner.
+{
+public:
+	PriorityEvent()
+	{
+	}
+
+	~PriorityEvent()
+	{
+	}
+
+private:
+	PriorityEvent(const PriorityEvent&);
+	PriorityEvent& operator = (const PriorityEvent&);
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_PriorityEvent_INCLUDED