Remove privacy breaches from the HTML documentation

[asarhaddon]

Icons and screenshots should not inform distant websites each time an user reads readme.html.

The suggestions in this draft are independent and will probably be discussed separately, but they affect a single file so for a first review a single commit is convenient.

• Documentation content changes

Each time a navigator renders the README html version, it sends a request to the sites providing images for example.

This patch removes fancy buttons and downloads the screenshots on-demand. For the screenshots, another option is to store them in the VCS.

Does this introduce a breaking change?

• No

[github-actions]

There hasn't been any activity on this pull request recently, and in order to prioritize active work, it has been marked as stale.
This PR will be closed and locked in 7 days if no further activity occurs.
Thank you for your contributions!

[asarhaddon]

Hello.
This issue is not urgent, and you may eventually decide that it is not worth fixing. But it would be disappointing that a robot closes it only because it is not discussed fast enough.

[t52ta6ek]

Maybe an easier way to solve this, rather than require a user explicitly click a link to pull up the image on imgur.com, is simply to embed the image using github's native cabability to do that itself. Example: https://github.com/t52ta6ek/APRS-SmartBeaconing-Worksheet . The screenshot of the worksheet is embedded in the README.md . That should address privacy concerns since the image is maintained at github (assuming https://user-images.githubusercontent.com is still github - LOL) and retains the original look and feel of the current README.rst implementation.

[asarhaddon]

The (minor) issue is that a distant site is informed whenever someone reads the documentation, even a preformatted documentation on a local computer. That the distant site is imgur, github or githubusercontent.com is irrelevant here.
That said, the authors may be interested in your suggestion for other reasons.