void silc_fsm_next_later(void *fsm, SilcFSMStateCallback next_state,
                             SilcUInt32 seconds, SilcUInt32 useconds);

    Set the next state to be executed later, at the specified time.
    The SILC_FSM_WAIT must be returned in the state function if this
    function is called.  If any other state is returned machine operation
    is undefined.  The machine or thread will move to `next_state' after
    the specified timeout.  This function is used with both SilcFSM and
    SilcFSMThread contexts.

    If both `seconds' and `useconds' are 0, the effect is same as calling
    silc_fsm_next function, and SILC_FSM_CONTINUE must be returned.

    If silc_fsm_continue or silc_fsm_continue_sync is called while the
    machine or thread is in SILC_FSM_WAIT state the timeout is automatically
    canceled and the state moves to the next state.

    // Move to next state after 10 seconds
    silc_fsm_next_later(fsm, next_state, 10, 0);
    return SILC_FSM_WAIT;