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_OpenSSL/include/Poco/Net/SecureServerSocket.h

@@ -0,0 +1,136 @@
+//
+// SecureServerSocket.h
+//
+// Library: NetSSL_OpenSSL
+// Package: SSLSockets
+// Module:  SecureServerSocket
+//
+// Definition of the SecureServerSocket class.
+//
+// Copyright (c) 2006-2009, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef NetSSL_SecureServerSocket_INCLUDED
+#define NetSSL_SecureServerSocket_INCLUDED
+
+
+#include "Poco/Net/NetSSL.h"
+#include "Poco/Net/ServerSocket.h"
+#include "Poco/Net/Context.h"
+
+
+namespace Poco {
+namespace Net {
+
+
+class NetSSL_API SecureServerSocket: public ServerSocket
+	/// A server socket for secure SSL connections.
+{
+public:
+	SecureServerSocket();
+		/// Creates a SSL server socket using the
+		/// default SSL server context.
+		///
+		/// The server socket must be bound to
+		/// an address and put into listening state.
+
+	explicit SecureServerSocket(Context::Ptr pContext);
+		/// Creates a SSL server socket, using the
+		/// given SSL context object.
+		///
+		/// The server socket must be bound to
+		/// an address and put into listening state.
+
+	SecureServerSocket(const Socket& socket);
+		/// Creates the SecureServerSocket with the SocketImpl
+		/// from another socket. The SocketImpl must be
+		/// a SecureServerSocketImpl, otherwise an InvalidArgumentException
+		/// will be thrown.
+
+	SecureServerSocket(const SocketAddress& address, int backlog = 64);
+		/// Creates a server socket using the default server SSL context,
+		/// binds it to the given address and puts it in listening
+		/// state.
+		///
+		/// After successful construction, the server socket
+		/// is ready to accept connections.
+
+	SecureServerSocket(const SocketAddress& address, int backlog, Context::Ptr pContext);
+		/// Creates a server socket using the given SSL context, binds it
+		/// to the given address and puts it in listening
+		/// state.
+		///
+		/// After successful construction, the server socket
+		/// is ready to accept connections.
+
+	SecureServerSocket(Poco::UInt16 port, int backlog = 64);
+		/// Creates a server socket using the default server SSL context,
+		/// binds it to the given port and puts it in listening
+		/// state.
+		///
+		/// After successful construction, the server socket
+		/// is ready to accept connections.
+
+	SecureServerSocket(Poco::UInt16 port, int backlog, Context::Ptr pContext);
+		/// Creates a server socket using the given SSL context, binds it
+		/// to the given port and puts it in listening
+		/// state.
+		///
+		/// After successful construction, the server socket
+		/// is ready to accept connections.
+
+	virtual ~SecureServerSocket();
+		/// Destroys the StreamSocket.
+
+	SecureServerSocket& operator = (const Socket& socket);
+		/// Assignment operator.
+		///
+		/// Releases the socket's SocketImpl and
+		/// attaches the SocketImpl from the other socket and
+		/// increments the reference count of the SocketImpl.	
+
+	StreamSocket acceptConnection(SocketAddress& clientAddr);
+		/// Get the next completed connection from the
+		/// socket's completed connection queue.
+		///
+		/// If the queue is empty, waits until a connection
+		/// request completes.
+		///
+		/// Returns a new SSL socket for the connection
+		/// with the client.
+		///
+		/// The client socket's address is returned in clientAddr.
+		///
+		/// No SSL handshake is performed on the new connection.
+		/// The SSL handshake will be performed the first time
+		/// sendBytes(), receiveBytes() or completeHandshake()
+		/// is called on the returned SecureStreamSocket.
+
+	StreamSocket acceptConnection();
+		/// Get the next completed connection from the
+		/// socket's completed connection queue.
+		///
+		/// If the queue is empty, waits until a connection
+		/// request completes.
+		///
+		/// Returns a new SSL socket for the connection
+		/// with the client.
+		///
+		/// No SSL handshake is performed on the new connection.
+		/// The SSL handshake will be performed the first time
+		/// sendBytes(), receiveBytes() or completeHandshake()
+		/// is called on the returned SecureStreamSocket.
+
+	Context::Ptr context() const;
+		/// Returns the SSL context used by this socket.
+};
+
+
+} } // namespace Poco::Net
+
+
+#endif // NetSSL_SecureServerSocket_INCLUDED