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/DirectoryIterator.h

@@ -0,0 +1,153 @@
+//
+// DirectoryIterator.h
+//
+// Library: Foundation
+// Package: Filesystem
+// Module:  DirectoryIterator
+//
+// Definition of the DirectoryIterator class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_DirectoryIterator_INCLUDED
+#define Foundation_DirectoryIterator_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/File.h"
+#include "Poco/Path.h"
+
+
+namespace Poco {
+
+
+class DirectoryIteratorImpl;
+
+
+class Foundation_API DirectoryIterator
+	/// The DirectoryIterator class is used to enumerate
+	/// all files in a directory.
+	///
+	/// DirectoryIterator has some limitations:
+	///   * only forward iteration (++) is supported
+	///   * an iterator copied from another one will always
+	///     point to the same file as the original iterator,
+	///     even is the original iterator has been advanced
+	///     (all copies of an iterator share their state with
+	///     the original iterator)
+	///   * because of this you should only use the prefix 
+	///     increment operator
+{
+public:
+	DirectoryIterator();
+		/// Creates the end iterator.
+		
+	DirectoryIterator(const std::string& path);
+		/// Creates a directory iterator for the given path.
+
+	DirectoryIterator(const DirectoryIterator& iterator);
+		/// Creates a directory iterator for the given path.
+		
+	DirectoryIterator(const File& file);
+		/// Creates a directory iterator for the given file.
+
+	DirectoryIterator(const Path& path);
+		/// Creates a directory iterator for the given path.
+
+	virtual ~DirectoryIterator();
+		/// Destroys the DirectoryIterator.
+
+	const std::string& name() const;
+		/// Returns the current filename.
+		
+	const Path& path() const;
+		/// Returns the current path.
+
+	DirectoryIterator& operator = (const DirectoryIterator& it);
+	DirectoryIterator& operator = (const File& file);
+	DirectoryIterator& operator = (const Path& path);
+	DirectoryIterator& operator = (const std::string& path);
+	
+	virtual DirectoryIterator& operator ++ ();   // prefix
+	
+	//@ deprecated
+	DirectoryIterator operator ++ (int); // postfix
+		/// Please use the prefix increment operator instead.
+	
+	const File& operator * () const;
+	File& operator * ();
+	const File* operator -> () const;
+	File* operator -> ();
+	
+	bool operator == (const DirectoryIterator& iterator) const;
+	bool operator != (const DirectoryIterator& iterator) const;
+
+protected:
+	Path _path;
+	File _file;
+
+private:
+	DirectoryIteratorImpl* _pImpl;
+};
+
+
+//
+// inlines
+//
+inline const std::string& DirectoryIterator::name() const
+{
+	return _path.getFileName();
+}
+
+	
+inline const Path& DirectoryIterator::path() const
+{
+	return _path;
+}
+
+
+inline const File& DirectoryIterator::operator * () const
+{
+	return _file;
+}
+
+
+inline File& DirectoryIterator::operator * ()
+{
+	return _file;
+}
+
+
+inline const File* DirectoryIterator::operator -> () const
+{
+	return &_file;
+}
+
+
+inline File* DirectoryIterator::operator -> ()
+{
+	return &_file;
+}
+
+
+inline bool DirectoryIterator::operator == (const DirectoryIterator& iterator) const
+{
+	return name() == iterator.name();
+}
+
+
+inline bool DirectoryIterator::operator != (const DirectoryIterator& iterator) const
+{
+	return name() != iterator.name();
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_DirectoryIterator_INCLUDED