Mark Sapiro

There are a number of failed tests using elasticsearch 5. I suspect even without the changes in this PR, several elasticsearch 5 tests will fail although they may be different...

@warsaw wrote: > This could happen in e.g. Mailman if you had really old archives, you wouldn't be able to parse their attachments. OTOH, maybe I'm worrying too much about...

The line `%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s` is unconverted from the old Mailman 2.1 list's footer. I have changed it to `https://mail.python.org/mm3/mailman3/lists/$list_id/` which will actually render as `https://mail.python.org/mm3/mailman3/lists/core-workflow.python.org/`.