SILC_FSM_CALL_CONTINUE_SYNC(fsm)

    Macro used to proceed after asynchornous call.  This is called in the
    callback of the asynchronous call to continue in the state machine.
    This continues to the next state synchronously, not through the
    scheduler.

    void some_callback(void *context) {
      SilcFSM fsm = context;
      ...
      // Continue to the next state immediately
      SILC_FSM_CALL_CONTINUE_SYNC(fsm);
    }