versioned container testing

[Karl Berry]

Hi Dmitry,

    I've noticed that in your test repository you seem to
    retain the old versions of the packages as well. 

Huh. No, it's not intentional. I guess I didn't insert the code to
remove older containers. I don't think we can ask CTAN and all mirrors
to distribute all versions of all TL packages :).

    Will that behaviour be the same in the final implementation of the
    feature? If yes, this would free us from a burden of maintaining our
    own snapshot.

Norbert is maintaining an archive of all TL package releases:
https://texlive.info/tlnet-archive/
E.g., for (my) today,
https://texlive.info/tlnet-archive/2019/11/20/tlnet/ (archive/ subdir as usual)

So maybe that will help you? It should be no problem to make it
available by rsync as well if it matters. --thanks, karl.