bug#23945: 25.1.50; Request for review: Gnus Cloud work in scratch/gnus-cloud

[Teodor Zlatanov]

I've published the proposed changes to the Gnus Cloud code in the branch
`scratch/gnus-cloud' and would like to request a code review. It's a
single commit which I've tested over the last 2 weeks with the help of
other Gnus users.

I'll add documentation if the code is acceptable.

Thank you
Ted