openSUSE admin

[Summary of a "how can I unsubscribe" question from the german ML]

Someone had problems to unsubscribe and noticed two problems:

a)
https://lists.opensuse.org/manage/lists/users.lists.opensuse.org/ has a form to subscribe without an account, but it doesn't allow to unsubscribe that way. -> It would be nice if that form also had an "unsubscribe" button.

b)
https://lists.opensuse.org/manage/lists/users.lists.opensuse.org/ -> click "Login" -> click "register on openSUSE mailing lists" results in a page saying "registration closed" (because we enforce login with an identity provider (openSUSE, github etc.) -> It would be nice to change text on the "registration closed" page to make it more helpful - basically something like "please login with your openSUSE/github/... account instead."

I have no idea how hard these things are to implement. If they are easy, please do them ;-) and/or tell me where I should open a feature request upstream if this needs upstream work.