+ * Revision 1.6 2000/07/16 12:29:16 mdw
+ * Change to arena `realloc' interface, to fix a design bug.
+ *
+ * Revision 1.5 2000/06/17 10:37:39 mdw
+ * Add support for arena management.
+ *
+ * Revision 1.4 1999/11/06 12:40:45 mdw
+ * Minor changes to allocation strategy.
+ *