+ * Revision 1.10 1998-02-10 11:56:46 adam
+ * Implemented rset_dup.
+ *
+ * Revision 1.9 1996/10/29 13:55:21 adam
+ * Include of zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.8 1995/12/11 09:15:23 adam
+ * New set types: sand/sor/snot - ranked versions of and/or/not in
+ * ranked/semi-ranked result sets.
+ * Note: the snot not finished yet.
+ * New rset member: flag.
+ * Bug fix: r_delete in rsrel.c did free bad memory block.
+ *
+ * Revision 1.7 1995/10/12 12:41:56 adam