[tex-live] pretest -> update texlive 2017

[Bob Tennent]

 >|> But I suspect many links at
 >|>
 >|> https://www.ctan.org/mirrors?lang=en
 >|>
 >|> are wrong.
 >|But are those not links to CTAN hierarchies, Bob, rather than links to
 >|TeX Live installation repositories ?

The page titled Installing TeX Live over the Internet links
to that page:

  your best bet is to choose explicitly from the list of CTAN mirrors

with no explanation of how to navigate to a texlive
repository.  

Bob