Allow the client to close the connection first

This is necessary when testing against OpenSSL 1.0.2g.

In the server, flush more often. Otherwise, when stdout is redirected to a
file, the server gets killed before it writes important information, such as
the logs that we expect in the test cases.

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

programs/ssl/ssl_server.c

@@ -312,16 +312,19 @@ int main(void)
  mbedtls_printf(" %d bytes written\n\n%s\n", len, (char *) buf);
 
  mbedtls_printf(" . Closing the connection...");
+ fflush(stdout);
 
  while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {
  if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
- ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
+ ret != MBEDTLS_ERR_SSL_WANT_WRITE &&
+ ret != MBEDTLS_ERR_NET_CONN_RESET) {
  mbedtls_printf(" failed\n ! mbedtls_ssl_close_notify returned %d\n\n", ret);
  goto reset;
  }
  }
 
  mbedtls_printf(" ok\n");
+ fflush(stdout);
 
  ret = 0;
  goto reset;