Add maximum.supported.desktop.version in Nc server
Relates to https://github.com/nextcloud/desktop/issues/4016
Jos will not like it: https://github.com/nextcloud/desktop/issues/4016#issuecomment-986600351
Relates to https://github.com/nextcloud/desktop/issues/4016
Jos will not like it: https://github.com/nextcloud/desktop/issues/4016#issuecomment-986600351