Is there more than one Windows "help" system?

[Ethan A M. <me...@uw...>]

I can see the the gnuplot 5.4 Windows executables from the distribution
site provide "help" via a set of html files generated by
   .../docs/windows/doc2html

But I am also seeing reports or queries (E.g. Bug #2353) implying that
the Windows build process needs a texinfo version produced by
   doc2texi.el

Is that correct?  I thought we had deprecated texinfo output and
that the *.el file was not being maintained.  The copy in the repository
looks to be out of date with respect to supported terminals and recently
added keys in the *.doc file.

Does the Windows build use it anyhow, or does it assume
a more up-to-date copy obtained elsewhere?
If it isn't used, should we move it to .../docs/old/ 
and remove the texinfo target from the Makefile?

	Ethan