Add (stub) header writing and checking
The number of meaning of the flags will be determined later, when handling the
relevant struct members. For now three bytes are reserved as an example, but
this number may change later.
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 1332014..89b560a 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -3985,6 +3985,8 @@
*
* \return \c 0 if successful.
* \return #MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed.
+ * \return #MBEDTLS_ERR_SSL_VERSION_MISMATCH if the serialized data
+ * comes from a different Mbed TLS version or build.
* \return #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if input data is invalid.
*/
int mbedtls_ssl_context_load( mbedtls_ssl_context *ssl,