Fix MBEDTLS_PRIVATE wrapping in tests and sample programs.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/programs/ssl/ssl_fork_server.c b/programs/ssl/ssl_fork_server.c
index 38a6883..5732108 100644
--- a/programs/ssl/ssl_fork_server.c
+++ b/programs/ssl/ssl_fork_server.c
@@ -17,8 +17,6 @@
  *  limitations under the License.
  */
 
-#define MBEDTLS_ALLOW_PRIVATE_ACCESS
-
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else
@@ -195,7 +193,7 @@
     mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
     mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
 
-    mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
+    mbedtls_ssl_conf_ca_chain( &conf, srvcert.MBEDTLS_PRIVATE(next), NULL );
     if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
     {
         mbedtls_printf( " failed!  mbedtls_ssl_conf_own_cert returned %d\n\n", ret );