Signed-off-by: Daira Hopwood <daira@jacaranda.org>
latest version of a file is well-defined when it has been modified by
multiple clients.
+To enable representing empty directories, a client that creates a
+directory should link a corresponding zero-length file in its DMD,
+at a name that ends with the encoded directory separator character.
+
We want to enable dynamic configuration of the set of clients subscribed
to a Magic Folder, without having to reconfigure or restart each client
when another client joins or leaves. To support this, we have a single