[tz] zic tweak to warn about non-ASCII in filenames

[Andreas Schwab]

Tim Parenti <tim at timtimeonline.com> writes:

> If you allow dot, you'll want to add checks that "." and ".." are not used
> as file name components.

And it shouldn't start with a dot.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab at suse.de
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