-This new version of process traceset middle will call the middle hooks for
-events until the first criterion is fulfilled : either the end time is passed,
-the number of events requested is passed or the end position is reached. When
-this function ends, the end position can be extracted from the context, the end
-event is set as described below and the number of events read is returned.
+This new version of process traceset middle will call the event hooks for
+events until the first criterion is fulfilled : either the end time is reached,
+the number of events requested is passed, the end position is reached or the
+last event hook list called returned TRUE. When this function ends, the end
+position can be extracted from the context, the end event is set as described
+below and the number of events read is returned.