1b954c3b4c
If when we request a LocalStatus folder, the folder has to be created, we look whether the other backend has data, and if it does we migrate it to the new backend. The old backend data is left untouched, so that if you change back say from sqlite to plaintext, the older data is still there. That should not lead to data loss, only a slower sync while the status folder gets updated. Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>