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/testsuite/src/DOMTestSuite.h

@@ -0,0 +1,27 @@
+//
+// DOMTestSuite.h
+//
+// Definition of the DOMTestSuite class.
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef DOMTestSuite_INCLUDED
+#define DOMTestSuite_INCLUDED
+
+
+#include "CppUnit/TestSuite.h"
+
+
+class DOMTestSuite
+{
+public:
+	static CppUnit::Test* suite();
+};
+
+
+#endif // DOMTestSuite_INCLUDED