-can be appended; they appear in $acl_arg1 to $acl_arg9, and $acl_narg is set
-to the count of values. The name and values are expanded separately.
+can be appended; they appear within the called ACL in $acl_arg1 to $acl_arg9,
+and $acl_narg is set to the count of values.
+Previous values of these variables are restored after the call returns.
+The name and values are expanded separately.