ENGINE_load_builtin_engines();
                OPENSSL_load_builtin_modules();
                if (strncmp(tls_engine_settings.engine_config.s, "NONE", 4)) {
                        err = CONF_modules_load_file(tls_engine_settings.engine_config.s, "kamailio", 0);
                        if (!err) {
                                LM_ERR("OpenSSL failed to load ENGINE configuration file: %*s\n", tls_engine_settings.engine_config.len, tls_engine_settings.engine_config.s);
                                goto error;
                        }
                }