The original rationale for keeping PEP 558 open as an alternative to PEP 667
no longer applies, so withdrawn is a more appropriate state than deferred.
* For most cases (including all PEP metadata), replace birth name with chosen name
* Birth name has been retained in parentheses when this makes other references
substantially clearer (e.g. references to mailing list posts, elected members
of the inaugural Steering Council)