+ * Revision 1.6 1998-03-18 09:23:55 adam
+ * Blocks are stored in chunks on free list - up to factor 2 in speed.
+ * Fixed bug that could occur in block category rearrangemen.
+ *
+ * Revision 1.5 1998/03/16 10:37:24 adam
+ * Added more statistics.
+ *
+ * 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
+ * First version of isc_merge that supports update/delete.
+ *
+ * Revision 1.1 1996/10/29 13:40:47 adam