+/* "debounce" is measured in keyboard scans. Some users reported
+ * needing values as high as 15, which was at the time around 50ms.
+ * If you don't define it here, the matrix code will default to
+ * 5, which is now closer to 10ms, but still plenty according to
+ * manufacturer specs.
+ *
+ * Default is quite high, because of reports with some production
+ * runs seeming to need it. This may change when configuration for
+ * this is more directly exposed.
+ */