extern acl_block *acl_read(uschar *(*)(void), uschar **);
extern int acl_check(int, uschar *, uschar *, uschar **, uschar **);
-extern int acl_check_args(int, address_item *, uschar *, int, uschar **, uschar **);
extern tree_node *acl_var_create(uschar *);
extern void acl_var_write(uschar *, uschar *, void *);