Fixed bug CORE-2656 : Error reading data from the connection. On disconnect

Thanks to Oleg Matveyev for test case and assistance

src/remote/inet.cpp

@@ -3039,6 +3039,7 @@ static bool packet_receive(rem_port* port, UCHAR* buffer, SSHORT buffer_length,
 
 	if (!n)
 	{
+		if (!(port->port_flags & PORT_detached))
 			inet_error(port, "read end_of_file", isc_net_read_err, inetErrNo);
 		return false;
 	}