+ * Revision 1.50 2000-11-29 14:24:01 adam
+ * Script configure uses yaz pthreads options. Added locking for
+ * zebra_register_{lock,unlock}.
+ *
+ * Revision 1.49 2000/05/18 12:01:36 adam
+ * System call times(2) used again. More 64-bit fixes.
+ *
+ * Revision 1.48 2000/04/05 09:49:35 adam
+ * On Unix, zebra/z'mbol uses automake.
+ *
+ * Revision 1.47 2000/03/20 19:08:36 adam
+ * Added remote record import using Z39.50 extended services and Segment
+ * Requests.
+ *
+ * Revision 1.46 2000/03/15 15:00:31 adam
+ * First work on threaded version.
+ *
+ * Revision 1.45 1999/11/30 13:48:04 adam
+ * Improved installation. Updated for inclusion of YAZ header files.
+ *
+ * Revision 1.44 1999/11/04 15:00:45 adam
+ * Implemented delete result set(s).
+ *
+ * Revision 1.43 1999/07/14 10:59:27 adam
+ * Changed functions isc_getmethod, isams_getmethod.
+ * Improved fatal error handling (such as missing EXPLAIN schema).
+ *
+ * Revision 1.42 1999/05/26 07:49:13 adam
+ * C++ compilation.
+ *
+ * Revision 1.41 1999/05/12 13:08:06 adam
+ * First version of ISAMS.
+ *
+ * Revision 1.40 1998/11/16 16:03:45 adam
+ * Moved loggin utilities to Yaz. Was implemented in file zlogs.c.
+ *
+ * Revision 1.39 1998/10/16 08:14:35 adam
+ * Updated record control system.
+ *
+ * Revision 1.38 1998/09/22 10:03:44 adam
+ * Changed result sets to be persistent in the sense that they can
+ * be re-searched if needed.
+ * Fixed memory leak in rsm_or.
+ *
+ * Revision 1.37 1998/09/02 13:53:22 adam
+ * Extra parameter decode added to search routines to implement
+ * persistent queries.
+ *
+ * Revision 1.36 1998/06/24 12:16:16 adam
+ * Support for relations on text operands. Open range support in
+ * DFA module (i.e. [-j], [g-]).
+ *
+ * Revision 1.35 1998/06/23 15:33:35 adam
+ * Added feature to specify sort criteria in query (type 7 specifies
+ * sort flags).
+ *
+ * Revision 1.34 1998/06/22 11:36:50 adam
+ * Added authentication check facility to zebra.
+ *
+ * Revision 1.33 1998/06/12 12:22:14 adam
+ * Work on Zebra API.
+ *
+ * Revision 1.32 1998/05/27 16:57:47 adam
+ * Zebra returns surrogate diagnostic for single records when
+ * appropriate.
+ *
+ * Revision 1.31 1998/05/20 10:12:23 adam