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

[Arthur David Olson]

Given its use in "filename.ext" names, dot pretty much must be included in
any list of file name characters.
It isn't used in any current distribution zone names, and its presence
might cause Windows shenanigans by making it look as if a name has an
extension.
Since we're in warning land, I'll advocate for warning about any dots in
file names;
this eliminates the need for more specific testing.

    --ado


On Thu, Jun 26, 2014 at 3:58 AM, Andreas Schwab <schwab at suse.de> wrote:

> 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
> GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
> "And now for something completely different."
>
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