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/NetSSL_Win/include/Poco/Net/ConsoleCertificateHandler.h

@@ -0,0 +1,50 @@
+//
+// ConsoleCertificateHandler.h
+//
+// Library: NetSSL_Win
+// Package: SSLCore
+// Module:  ConsoleCertificateHandler
+//
+// Definition of the ConsoleCertificateHandler class.
+//
+// Copyright (c) 2006-2014, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef NetSSL_ConsoleCertificateHandler_INCLUDED
+#define NetSSL_ConsoleCertificateHandler_INCLUDED
+
+
+#include "Poco/Net/NetSSL.h"
+#include "Poco/Net/InvalidCertificateHandler.h"
+
+
+namespace Poco {
+namespace Net {
+
+
+class NetSSL_Win_API ConsoleCertificateHandler: public InvalidCertificateHandler
+	/// A ConsoleCertificateHandler is invoked whenever an error occurs verifying the certificate.
+	/// 
+	/// The certificate is printed to stdout and the user is asked via console if he wants to accept it.
+{
+public:
+	ConsoleCertificateHandler(bool handleErrorsOnServerSide);
+		/// Creates the ConsoleCertificateHandler.
+
+	virtual ~ConsoleCertificateHandler();
+		/// Destroys the ConsoleCertificateHandler.
+
+	void onInvalidCertificate(const void* pSender, VerificationErrorArgs& errorCert);
+		/// Prints the certificate to stdout and waits for user input on the console
+		/// to decide if a certificate should be accepted/rejected.
+};
+
+
+} } // namespace Poco::Net
+
+
+#endif // NetSSL_ConsoleCertificateHandler_INCLUDED