bug#60190: 29.0.50; Improve `Info-goto-node-web'

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

> There's no need to maintain a list, we can produce it at build time by
> looking at the DIR file we produce in the info subdirectory.  This
> would solve the maintenance problem cleanly and easily.

OK, we could do that.

What would be the cleanest way to make that information available to
Lisp?  Do we just generate a new file at build-time and put it there, or
is there a better way?