bug#37820: 25.2; xref using etags incorrect case fold during completion

[Drew Adams]

> I would expect that you would follow the precedent
> of find-tag, which uses tags-case-fold-search and
> case-fold-search to determine whether a tags search
> is case-sensitive or not.
... 
> I found it surprising that completion would not
> follow the tags search itself in folding case, as I
> have become used to this useful behavior over many
> years of using find-tag.

+1