Disable (for now) check for HAVE_BERKELEY_DB_THREAD and hence disable

use of BerkeleyDB's Concurrent DB API.

build/openldap.m4

@@ -415,7 +415,8 @@ if test $ac_cv_header_db_h = yes; then
 	OL_BERKELEY_DB_LINK
 	if test "$ol_cv_lib_db" != no ; then
 		ol_cv_berkeley_db=yes
-		OL_BERKELEY_DB_THREAD
+dnl		Don't support Concurrent DB API
+dnl		OL_BERKELEY_DB_THREAD
 	fi
 fi
 ])

include/portable.h.in

@@ -733,9 +733,6 @@
 /* define if you have (or want) no threads */
 #undef NO_THREADS
 
-/* define if Berkeley DB has DB_THREAD support */
-#undef HAVE_BERKELEY_DB_THREAD
-
 /* define this if Berkeley DB is available */
 #undef HAVE_BERKELEY_DB