+ * 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
+ * Implemented automatic EXPLAIN database maintenance.
+ * Modified Zebra to work with ASN.1 compiled version of YAZ.
+ *
+ * Revision 1.30 1998/03/05 08:45:13 adam
+ * New result set model and modular ranking system. Moved towards
+ * descent server API. System information stored as "SGML" records.
+ *
+ * Revision 1.29 1998/02/10 12:03:06 adam
+ * Implemented Sort.
+ *
+ * Revision 1.28 1998/01/29 13:40:11 adam
+ * Better logging for scan service.
+ *
+ * Revision 1.27 1997/10/27 14:33:06 adam
+ * Moved towards generic character mapping depending on "structure"
+ * field in abstract syntax file. Fixed a few memory leaks. Fixed
+ * bug with negative integers when doing searches with relational
+ * operators.
+ *
+ * Revision 1.26 1997/09/29 12:41:35 adam
+ * Fixed bug regarding USE_TIMES var.
+ *
+ * Revision 1.25 1997/09/29 09:08:36 adam
+ * Revised locking system to be thread safe for the server.
+ *
+ * Revision 1.24 1997/09/17 12:19:19 adam
+ * Zebra version corresponds to YAZ version 1.4.
+ * Changed Zebra server so that it doesn't depend on global common_resource.
+ *
+ * Revision 1.23 1996/12/23 15:30:46 adam
+ * Work on truncation.
+ * Bug fix: result sets weren't deleted after server shut down.
+ *
+ * Revision 1.22 1996/11/04 14:07:49 adam
+ * Moved truncation code to trunc.c.
+ *
+ * Revision 1.21 1996/10/29 14:09:58 adam
+ * Use of cisam system - enabled if setting isamc is 1.
+ *
+ * Revision 1.20 1996/06/04 10:19:02 adam
+ * Minor changes - removed include of ctype.h.
+ *
+ * Revision 1.19 1996/05/14 11:34:01 adam
+ * Scan support in multiple registers/databases.
+ *
+ * Revision 1.18 1996/05/14 06:16:50 adam
+ * Compact use/set bytes used in search service.
+ *
+ * Revision 1.17 1995/12/08 16:22:57 adam
+ * Work on update while servers are running. Three lock files introduced.
+ * The servers reload their registers when necessary, but they don't
+ * reestablish result sets yet.
+ *
+ * Revision 1.16 1995/12/07 17:38:48 adam
+ * Work locking mechanisms for concurrent updates/commit.
+ *
+ * Revision 1.15 1995/11/21 15:29:13 adam
+ * Config file 'base' read by default by both indexer and server.
+ *
+ * Revision 1.14 1995/11/16 17:00:57 adam
+ * Better logging of rpn query.
+ *
+ * Revision 1.13 1995/11/16 15:34:56 adam
+ * Uses new record management system in both indexer and server.
+ *
+ * Revision 1.12 1995/10/27 14:00:12 adam
+ * Implemented detection of database availability.
+ *
+ * Revision 1.11 1995/10/17 18:02:12 adam
+ * New feature: databases. Implemented as prefix to words in dictionary.
+ *
+ * Revision 1.10 1995/10/09 16:18:38 adam
+ * Function dict_lookup_grep got extra client data parameter.
+ *
+ * Revision 1.9 1995/10/06 14:38:01 adam
+ * New result set method: r_score.
+ * Local no (sysno) and score is transferred to retrieveCtrl.
+ *
+ * Revision 1.8 1995/10/06 13:52:06 adam
+ * Bug fixes. Handler may abort further scanning.
+ *
+ * Revision 1.7 1995/10/06 10:43:57 adam
+ * Scan added. 'occurrences' in scan entries not set yet.
+ *
+ * Revision 1.6 1995/09/28 09:19:48 adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.5 1995/09/27 16:17:32 adam
+ * More work on retrieve.
+ *
+ * Revision 1.4 1995/09/14 11:53:28 adam
+ * First work on regular expressions/truncations.
+ *
+ * Revision 1.3 1995/09/08 08:53:23 adam
+ * Record buffer maintained in server_info.
+ *
+ * Revision 1.2 1995/09/06 16:11:19 adam