[S21.5] Add bignums to FAQ

[Hrvoje Niksic]

"Stephen J. Turnbull" <stephen at xemacs.org> writes:

> I know that Python at least and probably Perl have MP modules.  I bet
> Python bignums have a pickle method,

That's what my "reinventing" was all about -- turn them to strings
before dumping and back to opaque objects after dumping.  But Jerry
said he didn't know how to do that, and neither do I.

We need Olivier's help.