- Memory leak in the load_balance_mine() function is fixed. This would

leak ~20-30 octets per DHCPDISCOVER packet while failover was in use
  and in normal state. [ISC-Bugs #19548]

- Various compilation fixes have been included for the memory related
  DEBUG #defines in includes/site.h.  [ISC-Bugs #19548]

server/dhcp.c

@@ -2955,7 +2955,7 @@ relinquish_ackqueue(void)
 {
 	struct leasequeue *q, *n;
 	
-	for (q = ackqueue ; q ; q = n) {
+	for (q = ackqueue_head ; q ; q = n) {
 		n = q->next;
 		dfree(q, MDL);
 	}