+ * Revision 1.32 1996-02-01 20:50:04 adam
+ * Bug fix: zebraIndexUnlock was always called even though zebraIndexLock
+ * was never called - happens when no commands are specified.
+ *
+ * Revision 1.31 1996/01/08 19:15:46 adam
+ * New input filter that works!
+ *
+ * Revision 1.30 1995/12/12 16:00:59 adam
+ * System call sync(2) used after update/commit.
+ * Locking (based on fcntl) uses F_EXLCK and F_SHLCK instead of F_WRLCK
+ * and F_RDLCK.
+ *
+ * Revision 1.29 1995/12/11 11:43:30 adam
+ * Locking based on fcntl instead of flock.
+ * Setting commitEnable removed. Command line option -n can be used to
+ * prevent commit if commit setting is defined in the configuration file.
+ *
+ * Revision 1.28 1995/12/08 16:22:56 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 1.27 1995/12/07 17:38:47 adam
+ * Work locking mechanisms for concurrent updates/commit.
+ *
+ * Revision 1.26 1995/12/06 12:41:23 adam
+ * New command 'stat' for the index program.
+ * Filenames can be read from stdin by specifying '-'.
+ * Bug fix/enhancement of the transformation from terms to regular
+ * expressons in the search engine.
+ *
+ * Revision 1.25 1995/12/01 16:24:39 adam
+ * Commit files use separate meta file area.
+ *
+ * Revision 1.24 1995/11/30 17:01:38 adam
+ * New setting commitCache: points to commit directories/files.
+ * New command commit: commits at the end of a zebraidx run.
+ *
+ * Revision 1.23 1995/11/30 08:34:31 adam