Serializing a context does not save the user data

The user data is typically a pointer to a data structure or a handle which
may no longer be valid after the session is restored. If the user data needs
to be preserved, let the application do it. This way, it is a conscious
decision for the application to save/restore either the pointer/handle
itself or the object it refers to.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

tests/suites/test_suite_ssl.function

@@ -2105,6 +2105,8 @@ void perform_handshake( handshake_test_options* options )
                              mbedtls_mock_tcp_recv_msg,
                              NULL );
 
+        mbedtls_ssl_set_user_data_p( &server.ssl, &server );
+
 #if defined(MBEDTLS_TIMING_C)
         mbedtls_ssl_set_timer_cb( &server.ssl, &timer_server,
                                   mbedtls_timing_set_delay,