extern tree_node *acl_var_create(uschar *);
extern void acl_var_write(uschar *, uschar *, void *);
+extern void assert_no_variables(void *, int, const char *, int);
extern int auth_call_pam(const uschar *, uschar **);
extern int auth_call_pwcheck(uschar *, uschar **);
extern int auth_call_radius(const uschar *, uschar **);