+ * Revision 1.4 1996-11-08 11:15:28 adam
+ * Number of keys in chain are stored in first block and the function
+ * to retrieve this information, isc_pp_num is implemented.
+ *
+ * Revision 1.3 1996/11/04 14:08:55 adam
+ * Optimized free block usage.
+ *
+ * Revision 1.2 1996/11/01 08:59:13 adam