(aux_inherit_items): const qualifiers added to some arguments.
(aux_item_add_perm): Likewise.
(prepare_aux_item): Likewise.
(find_aux_item_definition): Likewise.
(aux_item_find_trigger): Likewise.
(aux_item_find_validator): Likewise.
(find_aux_item): Likewise.
(filter_aux_item_list): Likewise.
(delete_aux_item_list): Likewise.
(undelete_aux_item_list): Likewise.
(check_delete_aux_item_list): Likewise.