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/src/InputSource.cpp

@@ -0,0 +1,80 @@
+//
+// InputSource.cpp
+//
+// Library: XML
+// Package: SAX
+// Module:  SAX
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/SAX/InputSource.h"
+
+
+namespace Poco {
+namespace XML {
+
+
+InputSource::InputSource():
+	_bistr(0),
+	_cistr(0)
+{
+}
+
+
+InputSource::InputSource(const XMLString& systemId):
+	_systemId(systemId),
+	_bistr(0),
+	_cistr(0)
+{
+}
+
+
+InputSource::InputSource(XMLByteInputStream& bistr):
+	_bistr(&bistr),
+	_cistr(0)
+{
+}
+
+
+InputSource::~InputSource()
+{
+}
+
+
+void InputSource::setPublicId(const XMLString& publicId)
+{
+	_publicId = publicId;
+}
+
+
+void InputSource::setSystemId(const XMLString& systemId)
+{
+	_systemId = systemId;
+}
+
+
+void InputSource::setEncoding(const XMLString& encoding)
+{
+	_encoding = encoding;
+}
+
+
+void InputSource::setByteStream(XMLByteInputStream& bistr)
+{
+	_bistr = &bistr;
+}
+
+
+void InputSource::setCharacterStream(XMLCharInputStream& cistr)
+{
+	_cistr = &cistr;
+}
+
+
+} } // namespace Poco::XML
+