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/Hash.h

@@ -0,0 +1,105 @@
+//
+// Hash.h
+//
+// Library: Foundation
+// Package: Hashing
+// Module:  Hash
+//
+// Definition of the Hash class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_Hash_INCLUDED
+#define Foundation_Hash_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include <cstddef>
+
+
+namespace Poco {
+
+
+std::size_t Foundation_API hash(Int8 n);
+std::size_t Foundation_API hash(UInt8 n);
+std::size_t Foundation_API hash(Int16 n);
+std::size_t Foundation_API hash(UInt16 n);
+std::size_t Foundation_API hash(Int32 n);
+std::size_t Foundation_API hash(UInt32 n);
+std::size_t Foundation_API hash(Int64 n);
+std::size_t Foundation_API hash(UInt64 n);
+std::size_t Foundation_API hash(const std::string& str);
+
+
+template <class T>
+struct Hash
+	/// A generic hash function.
+{
+	std::size_t operator () (T value) const
+		/// Returns the hash for the given value.
+	{
+		return Poco::hash(value);
+	}
+};
+
+
+//
+// inlines
+//
+inline std::size_t hash(Int8 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(UInt8 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(Int16 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(UInt16 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(Int32 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(UInt32 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(Int64 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+inline std::size_t hash(UInt64 n)
+{
+	return static_cast<std::size_t>(n)*2654435761U; 
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_Hash_INCLUDED