bug#13041: 24.2; diacritic-fold-search

[martin rudalics]

> Since the existing variable that corresponds to the
> Unicode file CaseFolding.txt is `case-fold-search',
> its counterpart variable that corresponds to the Unicode file
> Decomposition.txt

Where is this file?

> could be called `decomposition-search'.
>
> Also like the existing `sort-fold-case', its counterpart could be called
> `sort-decomposition'.

martin