RE: diacritic-fold-search?

[Drew Adams]

> It may not be totally irrelevant to note that search engines make
> diacritic-agnostic search the default.  And some Web browsers (Chrome
> but not Firefox) do this for searches of a page they’re displaying.

Another good point.  Emacs has always made search case-insensitive by default
(`case-fold-search' is t), presumably for the same reason.

IMHO, it would be good for Emacs to handle this the same way it handles
case-sensitivity: off by default, with a simple toggle to turn it on.

`a' is no more the same as `A' than `è' is the same as `e'.  But for many
(most?) search purposes it is handy to be able to treat them the same.