Upgrade SabreDAV to 1.8.10
Updating SabreDAV namespaces
use the right interface \Sabre\DAVACL\PrincipalBackend\BackendInterface
remove obsolete placeholder call, fix #8881
Merge pull request #8724 from owncloud/update-sabre-2.0

Update SabreDAV to 1.8.10
Merge pull request #8882 from owncloud/remove-placeholdercall

remove obsolete placeholder call, fix #8881
[tx-robot] updated from transifex
- drop permissions table and related code
- the file/folder's permission is now stored in the file cache
- BackGroundWatcher has been removed - this has meanwhile be replaced by occ files:scan which can be executed in a cron jobs
- increase version to trigger database migration
Merge pull request #8852 from owncloud/kill-permissions-master

Kill permissions table
Add a system for (re)movable mount points
Don't do rename hooks for cache when moving the mountpoint
Make personal external mount points (re)movable from the files app
Move shared mount moving from the storage to the mount
Add the removing logic for mounts
Fix the removeMount for personal mounts
don't allow to share single files with delete permissions, user should only be possible to unshare a single file but never to delete it
Fix folder name for storage root
remove share mount
remove encryption keys if user unshares a file
bring back updateFileTarget() got lost during last rebase
allow moving files to the root