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/Crypto/src/CipherKey.cpp

@@ -0,0 +1,78 @@
+//
+// CipherKey.cpp
+//
+// Library: Crypto
+// Package: Cipher
+// Module:  CipherKey
+//
+// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Crypto/CipherKey.h"
+
+
+namespace Poco {
+namespace Crypto {
+
+
+CipherKey::CipherKey(const std::string& name,
+	const std::string& passphrase,
+	const std::string& salt,
+	int iterationCount,
+	const std::string &digest):
+		_pImpl(new CipherKeyImpl(name, passphrase, salt, iterationCount, digest))
+{
+}
+
+
+CipherKey::CipherKey(const std::string& name, const ByteVec& key, const ByteVec& iv):
+	_pImpl(new CipherKeyImpl(name, key, iv))
+{
+}
+
+
+CipherKey::CipherKey(const std::string& name):
+	_pImpl(new CipherKeyImpl(name))
+{
+}
+
+
+CipherKey::CipherKey(const CipherKey& other):
+	_pImpl(other._pImpl)
+{
+}
+
+
+CipherKey::CipherKey(CipherKey&& other) noexcept:
+	_pImpl(std::move(other._pImpl))
+{
+}
+
+
+CipherKey::~CipherKey()
+{
+}
+
+
+CipherKey& CipherKey::operator = (const CipherKey& other)
+{
+	if (&other != this)
+	{
+		_pImpl = other._pImpl;
+	}
+	return *this;
+}
+
+
+CipherKey& CipherKey::operator = (CipherKey&& other) noexcept
+{
+	_pImpl = std::move(other._pImpl);
+	return *this;
+}
+
+
+} } // namespace Poco::Crypto