Directory names which look like they have a --b2-versions version
string are now encrypted in full, so directories created by older
rclone (which left the version string in plain text) no longer
decrypt and vanished silently from listings.
DecryptDirName now falls back to the old form for such names so the
directory is listed, and logs the name it needs to be renamed to on
the underlying remote to make it accessible again. Document this in
the crypt docs.
Nick Craig-Wood
1583cce1e2