uid_t system_filter_uid = (uid_t)-1;
blob tcp_fastopen_nodata = { .data = NULL, .len = 0 };
-int tcp_out_fastopen = 0;
+tfo_state_t tcp_out_fastopen = TFO_NOT_USED;
#ifdef USE_TCP_WRAPPERS
uschar *tcp_wrappers_daemon_name = US TCP_WRAPPERS_DAEMON_NAME;
#endif