Added function to set the number of forced fast polls.

src/sinqController.h

@@ -341,6 +341,12 @@ class epicsShareClass sinqController : public asynMotorController {
      * initializes the `outstandingForcedFastPolls` variable and then defers to
      * the base class method.
      *
+     * The `wakePoller` function of the base class `asynController` sends a
+     * signal to the poller thread which forces the latter to perform a number
+     * of fast / busy polls with the busy poll period regardless of whether the
+     * motor is moving or not. The number of polls is specified by
+     * "forcedFastPolls()" and can be set with `setForcedFastPolls()`.
+     *
      * @return asynStatus
      */
     asynStatus wakeupPoller();