NAME
    IND_SETTHRESH -- Set the key repeat threshold

FUNCTION
    This command sets the time that a key must be held down before
    it can repeat.  The repeatability of a key may be restricted
    (as, for example, are the shift keys).

    This command always executes immediately.

IO REQUEST - a timerequest
    tr_node.io_message      mn_replyport set if quick i/o is not possible
    tr_node.io_device       preset by the call to opendevice
    tr_node.io_unit         preset by the call to opendevice
    tr_node.io_command      ind_setthresh
    tr_node.io_flags        iob_quick set if quick i/o is possible
    tr_time.tv_secs         the threshold seconds
    tr_time.tv_micro        the threshold microseconds