Document the default value for the maximum fragment length
@@ -2761,6 +2761,7 @@ void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
* usually negotiated by the client during handshake)
* (Client: set maximum fragment length to emit *and*
* negotiate with the server during handshake)
+ * (Default: #MBEDTLS_SSL_MAX_FRAG_LEN_NONE)
*
* \note On the client side, the maximum fragment length extension
* *will not* be used, unless the maximum fragment length has
