This adds the new login flow. The desktop client will open up a browser
and poll a returned endpoint at regular intervals to check if the flow
is done.
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
* a one-time job gets scheduled after each update via a repair job
* the job remove all directories inside data/updater-INSTANCEID/backups except the 3 most recent ones (determined by mtime of the folder)
Signed-off-by: Morris Jobke <hey@morrisjobke.de>