Clarify Samba restore restrictions #487

[Hooverdan96]

Fixes #487 Fixes #457

This pull request's proposal

Add comment clarifying which parts of Samba exports can't be restored yet.

Checklist

• [X] With the proposed changes no Sphinx errors or warnings are generated.
• [ ] I have added my name to the AUTHORS file, if required (descending alphabetical order).

[Hooverdan96]

@phillxnet, see whether this is sufficient to clarify until there is time to address this gap.

[Hooverdan96]

Statement is updated to new phrasing.

[phillxnet]

@FroggyFlox Thanks for the initial suggestion here. Much appreciated.

[phillxnet]

PR product PRODUCTION published.