The files home node must also return DAV properties like etag,
permissions, etc for the clients to work like they did with the old
endpoint.
This fix makes FilesHome extend the Sabre Directory class, this makes
the FilesPlugin and other plugins recognize it as a directory and will
retrieve the matching properties when applicable.
Downstream of https://github.com/owncloud/core/pull/26066
Signed-off-by: Lukas Reschke <lukas@statuscode.ch>
For owncloud/client#5056
Users can configure arbitrary subfolders for syncing, therefore we should
always return it when asked for.
The sync client makes sure to not always ask for it to save bandwidth.
