Planka v2.0.1 moved all uploads to a unified data directory:
- public/{favicons,user-avatars,background-images} -> data/protected/
- private/attachments -> data/private/
The update script was still restoring files to the old locations,
which made attachments, avatars and backgrounds disappear after
updating from rc.4 to 2.0.1.
Changes:
- update_script: backup handles both old and new layouts
- update_script: restore now uses new v2 paths
- install script: create v2 data directories on fresh install
Ref #12066
