+ /* The value of authenticated_id is stored in the spool file and printed in
+ log lines. It must not contain binary zeros or newline characters. In
+ normal use, it never will, but when playing around or testing, this error
+ can (did) happen. To guard against this, ensure that the id contains only
+ printing characters. */
+
+ if (set_id != NULL) set_id = string_printing(set_id);
+