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/src/StreamTokenizer.cpp

@@ -0,0 +1,105 @@
+//
+// StreamTokenizer.cpp
+//
+// Library: Foundation
+// Package: Streams
+// Module:  StreamTokenizer
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/StreamTokenizer.h"
+
+
+namespace Poco {
+
+
+StreamTokenizer::StreamTokenizer():
+	_pIstr(0)
+{
+}
+
+
+StreamTokenizer::StreamTokenizer(std::istream& istr):
+	_pIstr(&istr)
+{
+}
+
+
+StreamTokenizer::~StreamTokenizer()
+{
+	for (auto& t: _tokens)
+	{
+		delete t.pToken;
+	}
+}
+
+
+void StreamTokenizer::attachToStream(std::istream& istr)
+{
+	_pIstr = &istr;
+}
+
+
+void StreamTokenizer::addToken(Token* pToken)
+{
+	poco_check_ptr (pToken);
+
+	TokenInfo ti;
+	ti.pToken = pToken;
+	ti.ignore = (pToken->tokenClass() == Token::COMMENT_TOKEN || pToken->tokenClass() == Token::WHITESPACE_TOKEN);
+	_tokens.push_back(ti);
+}
+
+
+void StreamTokenizer::addToken(Token* pToken, bool ignore)
+{
+	poco_check_ptr (pToken);
+
+	TokenInfo ti;
+	ti.pToken = pToken;
+	ti.ignore = ignore;
+	_tokens.push_back(ti);
+}
+
+	
+const Token* StreamTokenizer::next()
+{
+	poco_check_ptr (_pIstr);
+	
+	static const int eof = std::char_traits<char>::eof();
+
+	int first = _pIstr->get();
+	TokenVec::const_iterator it = _tokens.begin();
+	while (first != eof && it != _tokens.end())
+	{
+		const TokenInfo& ti = *it;
+		if (ti.pToken->start((char) first, *_pIstr))
+		{
+			ti.pToken->finish(*_pIstr);
+			if (ti.ignore) 
+			{
+				first = _pIstr->get();
+				it = _tokens.begin();
+			}
+			else return ti.pToken;
+		}
+		else ++it;
+	}
+	if (first == eof)
+	{
+		return &_eofToken;
+	}
+	else
+	{
+		_invalidToken.start((char) first, *_pIstr);
+		return &_invalidToken;
+	}
+}
+
+
+} // namespace Poco