[tex-live] User names too longs or with diacritics on Windows

[Akira Kakuto]

Dear Philip,

> http://msdn.microsoft.com/en-gb/library/windows/desktop/dd317748%28v=vs.85%29.aspx
> refers.

Many thanks. I little understand the file name system in windows
to improve the present status of kpathsea, sorry.

Thanks,
Akira