[tldoc] \ref missing; tl22 imminent

[Karl Berry]

Hi Denis,

    https://www.nongnu.org/chktex/
    ...
    > \Ucom{tlmgr option repository http://mirror.ctan.org/systems/texlive/tlnet}
    shouldn't it be `https` instead of `http:`?
    
Yes x 2.

Rather than make these changes now, though, I think I'll go through and
change all the http(s)'s for next year. The http mirror auto-redirects
to https anyway, and chktex is hardly maintained (six years since the
last release), so I have to doubt that anyone will notice ... --thanks, karl.