+ * NOTE: If we have a full receive buffer here, we only renege if
+ * our receiver can still make progress without the tsn being
+ * received. We do this because in the event that the associations
+ * receive queue is empty we are filling a leading gap, and since
+ * reneging moves the gap to the end of the tsn stream, we are likely
+ * to stall again very shortly. Avoiding the renege when we fill a
+ * leading gap is a good heuristic for avoiding such steady state
+ * stalls.