+ * Revision 1.25 1995-11-16 15:34:54 adam
+ * Uses new record management system in both indexer and server.
+ *
+ * Revision 1.24 1995/11/15 19:13:08 adam
+ * Work on record management.
+ *
+ * Revision 1.23 1995/10/27 14:00:10 adam
+ * Implemented detection of database availability.
+ *
+ * Revision 1.22 1995/10/17 18:02:07 adam
+ * New feature: databases. Implemented as prefix to words in dictionary.
+ *
+ * Revision 1.21 1995/10/10 12:24:38 adam
+ * Temporary sort files are compressed.
+ *
+ * Revision 1.20 1995/10/06 13:52:05 adam
+ * Bug fixes. Handler may abort further scanning.
+ *
+ * Revision 1.19 1995/10/04 12:55:16 adam
+ * Bug fix in ranked search. Use=Any keys inserted.
+ *
+ * Revision 1.18 1995/10/04 09:37:08 quinn
+ * Fixed bug.
+ *
+ * Revision 1.17 1995/10/03 14:28:57 adam
+ * Buffered read in extract works.
+ *
+ * Revision 1.16 1995/10/03 14:28:45 adam
+ * Work on more effecient read handler in extract.
+ *
+ * Revision 1.15 1995/10/02 15:42:53 adam
+ * Extract uses file descriptors instead of FILE pointers.
+ *
+ * Revision 1.14 1995/10/02 15:29:13 adam
+ * More logging in file_extract.
+ *
+ * Revision 1.13 1995/09/29 14:01:39 adam
+ * Bug fixes.
+ *
+ * Revision 1.12 1995/09/28 14:22:56 adam
+ * Sort uses smaller temporary files.
+ *
+ * Revision 1.11 1995/09/28 12:10:31 adam
+ * Bug fixes. Field prefix used in queries.
+ *
+ * Revision 1.10 1995/09/28 09:19:41 adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.9 1995/09/27 12:22:28 adam
+ * More work on extract in record control.
+ * Field name is not in isam keys but in prefix in dictionary words.
+ *
+ * Revision 1.8 1995/09/14 07:48:22 adam
+ * Record control management.
+ *
+ * Revision 1.7 1995/09/11 13:09:32 adam
+ * More work on relevance feedback.
+ *
+ * Revision 1.6 1995/09/08 14:52:27 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 1995/09/05 15:28:39 adam
+ * More work on search engine.
+ *
+ * Revision 1.3 1995/09/04 12:33:41 adam
+ * Various cleanup. YAZ util used instead.
+ *
+ * Revision 1.2 1995/09/04 09:10:34 adam