+ * Revision 1.16 1996-10-29 14:06:45 adam
+ * Include zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.15 1996/06/04 10:18:58 adam
+ * Minor changes - removed include of ctype.h.
+ *
+ * Revision 1.14 1996/04/09 06:49:18 adam
+ * Traversal of directories doesn't follow symbolic links.
+ *
+ * Revision 1.13 1996/03/21 14:50:08 adam
+ * File update uses modify-time instead of change-time.
+ *
+ * Revision 1.12 1996/02/05 12:29:55 adam
+ * Logging reduced a bit.
+ * The remaining running time is estimated during register merge.
+ *
+ * Revision 1.11 1995/11/20 16:59:44 adam
+ * New update method: the 'old' keys are saved for each records.
+ *
+ * Revision 1.10 1995/11/20 11:56:22 adam
+ * Work on new traversal.
+ *
+ * Revision 1.9 1995/10/30 13:42:12 adam
+ * Added errno.h
+ *
+ * Revision 1.8 1995/10/10 13:59:23 adam
+ * Function rset_open changed its wflag parameter to general flags.
+ *
+ * Revision 1.7 1995/09/28 09:19:40 adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.6 1995/09/08 14:52:26 adam
+ * Minor changes. Dictionary is lower case now.
+ *
+ * Revision 1.5 1995/09/06 16:11:16 adam
+ * Option: only one word key per file.
+ *
+ * Revision 1.4 1995/09/04 12:33:41 adam
+ * Various cleanup. YAZ util used instead.
+ *
+ * Revision 1.3 1995/09/01 14:06:35 adam