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/AbstractPriorityDelegate.h

@@ -0,0 +1,63 @@
+//
+// AbstractPriorityDelegate.h
+//
+// Library: Foundation
+// Package: Events
+// Module:  AbstractPriorityDelegate
+//
+// Implementation of the AbstractPriorityDelegate template.
+//
+// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_AbstractPriorityDelegate_INCLUDED
+#define Foundation_AbstractPriorityDelegate_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/AbstractDelegate.h"
+
+
+namespace Poco {
+
+
+template <class TArgs> 
+class AbstractPriorityDelegate: public AbstractDelegate<TArgs>
+	/// Base class for PriorityDelegate and PriorityExpire.
+	///
+	/// Extends AbstractDelegate with a priority value.
+{
+public:
+	AbstractPriorityDelegate(int prio):
+		_priority(prio)
+	{
+	}
+
+	AbstractPriorityDelegate(const AbstractPriorityDelegate& del):
+		AbstractDelegate<TArgs>(del),
+		_priority(del._priority)
+	{
+	}
+
+	virtual ~AbstractPriorityDelegate() 
+	{
+	}
+
+	int priority() const
+	{
+		return _priority;
+	}
+
+protected:
+	int _priority;
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_AbstractPriorityDelegate_INCLUDED