- Hash the root password with a random SHA-512 salt instead of the fixed
"$6$kgPoiREy".
- Talk to gstfsd through one helper with a 120 s socket timeout; an
unreachable daemon or a bad reply is an error message, not a 500.
- gstfsd refuses to listen on a non-loopback address unless
GSTFSD_ALLOW_REMOTE=1: it is an unauthenticated root service.
- gstfsd: encode replies (sendall(str) raised TypeError on Python 3, so
the success path never worked) and use octal chmod modes.
- README: what gstfsd does and how to allow it on a remote compute.
