bug#25391: 24.5; ffap-guesser "stack overflow in regexp matcher" error may crash emacs.

[Thierry Volpiatto]

npostavs@users.sourceforge.net writes:

> Yes, although that's also true before my patch.  So `ffap-gopher-regexp'
> never actually supported being changed.  I'm not sure if it's a good
> idea to add support for that.

I think it is, gopher is not widely used AFAIK, and allowing disabling
it would avoid needless search in most cases, thus it make it consistent
with other ffap* fns that can be disabled; I have a lot of complains at
helm with ffap annoyances and having more flexibility on this is interesting.
 
> +  (when (stringp ffap-gopher-regexp)

That's what I expected.

Thanks.

-- 
Thierry