changelog/10.9.0_2021-12-20/39353
Bugfix: Prohibit email/displayname change via API when not allowed
When the configs `allow_user_to_change_mail_address` or
`allow_user_to_change_display_name` are set to `false`,
changing the corresponding values via the provisioning API
is no longer possible.
https://github.com/owncloud/core/pull/39353
https://github.com/owncloud/core/issues/39332