Some connstr timeout option error messages don't match the name of the invalid option

// Volatile: This option is subject to change at any time.

if valStr, ok := fetchOption("kv_scan_timeout"); ok {

    val, err := strconv.ParseInt(valStr, 10, 64)

    if err != nil {

        return fmt.Errorf("query_timeout option must be a number")

    }

    c.timeoutsConfig.KVTimeout = time.Duration(val) * time.Millisecond

}