AVL delete upon shutdown (ITS#2367)

servers/slapd/back-bdb/init.c

@@ -446,6 +446,7 @@ bdb_db_close( BackendDB *be )
 	entry = bdb->bi_idl_lru_head;
 	while ( entry != NULL ) {
 		next_entry = entry->idl_lru_next;
+		avl_delete( &bdb->bi_idl_tree, (caddr_t) entry, bdb_idl_entry_cmp );
 		free( entry->idl );
 		free( entry->kstr.bv_val );
 		free( entry );