Bug#891038: Please document "cloud" variant differences in the description

[Josh Triplett <josh@joshtriplett.org>]

Package: linux-image-cloud-amd64
Severity: wishlist

The description of linux-image-cloud-amd64 just says:

This package depends on the latest Linux kernel and modules for use on Amazon EC2, Google Compute Engine and Microsoft Azure cloud platforms.                                                                       ▒

Please document, in the package description, the key configuration
differences between the cloud variant and the baseline kernel. What
makes it more suitable for cloud platforms, what's the general theme of
what it changes, what do you gain by running a cloud kernel, what
happens if you try to run a cloud kernel on a native platform, etc.