Update POCO library.

vendor/POCO/NetSSL_OpenSSL/include/Poco/Net/SecureSocketImpl.h

@@ -161,6 +161,15 @@ public:
 		/// underlying TCP connection. No orderly SSL shutdown
 		/// is performed.
 
+	void setBlocking(bool flag);
+		/// Sets the socket in blocking mode if flag is true,
+		/// disables blocking mode if flag is false.
+
+	bool getBlocking() const;
+		/// Returns the blocking mode of the socket.
+		/// This method will only work if the blocking modes of
+		/// the socket are changed via the setBlocking method!
+
 	int sendBytes(const void* buffer, int length, int flags = 0);
 		/// Sends the contents of the given buffer through
 		/// the socket. Any specified flags are ignored.
@@ -281,6 +290,7 @@ private:
 	bool _needHandshake;
 	std::string _peerHostName;
 	Session::Ptr _pSession;
+	bool _bidirectShutdown = true;
 
 	friend class SecureStreamSocketImpl;
 };