AWS is no longer publishing the history on GitHub, so we
instead rely on older copies of the website to track the old
release dates. This is done at 2 cutoff points right now for
1.19 and 1.20.
Older releases are available on the web archive, but those
pages didn't include release dates so not helpful.
Create a common function to write resulting JSON files to the releases directory.
It makes this task simpler to read and maintain, while making it modifiable at a central point in the future.
One example of such modification could be the sorting of the versions in a uniform way for all the scripts.
This creates a common function to fetch HTTP URLs, with enhanced capabilities (retry, use of a known User-Agent).
It makes scripts that need those capabilities simpler, while improving other scripts.
This commit also fixes some scripts that did not log properly (cos.py, eks.py, haproxy.py, palo-alto-networks.py, rhel.py, ros.py, unrealircd.py).
