multibyte implementation (for filename completion with umlauts)

[Andy Spiegl <zsh.Andy@xxxxxxxxx>]

Another question from the past:  :-)

Back in 2011 we found that a filename with umlauts (öäü) can't be completed
case insensitively because zsh can't handle multibyte characters correctly
because it's a pretty complex issue:
 http://www.zsh.org/mla/users/2011/msg00015.html

Ever since then I live with it more or less happily.  All I could find
today in the docs is a TODO entry:
 * support for multibyte characters, including UTF-8

So I suppose the multibyte problem in the completion code is still there, right?

Actually, all I'd like to achieve is case insensitivity for umlauts like that:
 zstyle ':completion:*' matcher-list 'm:{A-ZÄÖÜa-zäöü}={a-zäöüA-ZÄÖÜ}

Any ideas?

Thanks so much!
 Andy

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