[latexrefman] Added html files from "make htmlsplit"

[Karl Berry]

    Before we advertise, I'd like to write up a "how to mirror it" page.

I'm in no hurry to advertise anything. I expect you'll be the one doing
the advertising anyway :). Maybe it would be sensible to make another
release, even without many changes, just to publicize the new domain.
It should also probably be mentioned in the manual itself?

  Thus, only alphanumerics, the special characters "$-_.+!*'(),"

Huh. I wasn't aware of that. In practice, @ certainly works.
http://tug.org/~karl/@.html
should display the "at at at" string I just echoed in there.
https://en.wikipedia.org/wiki/@ also works (redirects, but).

Oh, it's probably because of the
https://user:pw@dom.ain/... feature. Well, whatever. Certainly safer to
leave the "at" string in any case.

Thanks,
Karl