Problem link from https://manpages.debian.org/

[Richard Owlett <rowlett@cloud85.net>]

I was having problems getting some man pages.
Attempting to diagnose my problem I went to
" 4.Browse the repository index:" .

I clicked on the links titled
    Debian stretch
      <https://manpages.debian.org/contents-stretch.html>
    Debian stretch-backports
      <https://manpages.debian.org/contents-stretch-backports.html>

Neither link responded while similar links for jessie, testing, and 
unstable worked as expected.