Log output incorrectly shows no creds even when netrc is loaded successfully

[TJC]

If you pass --netrc and use a valid netrc file, you still end up with log output like this:

INFO[0000] Starting CIFS :: creds: { user=,pass=****,domain=,security= }, netrc: /etc/docker/cifs/, opts:

However connections do work, indicating that the user and domain were loaded OK.