bug#19302: 24.4.51; `date-to-time' fails after 2038

[Gabriel]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Lars Magne Ingebrigtsen <larsi@gnus.org>
>> My solution would be to just document this ("Emacs does not support
>> dates further into the future than 2038 on OS-es with 32-bit
>> time_t") and move on.
>
> Yes.

I'd be willing to try and document that.
I thought `date-to-time' would have been the right place to do that.
(Given the backtrace I had stopped there)
But I could write it in the Elisp manual too.

And write a patch and send it to emacs-devel?

(Sorry, I need pointers for my first contribution)

Thanks