Richard Lynch wrote:
> I wonder if the changes that allow for Interntional domain names, with
> various Unicode characters I don't even know how to get out of my
> keyboard, *ALSO* made _ suddenly be legal...
>
> Just a hypothesis.
>
> I gotta say that Apache being current on RFCs and IE being broken
> seems a lot more likely to this naive reader... :-)
>
> And you have to admit that if various characters that my keyboard
> can't even produce are valid URL characters, then outlawing '_' is
> kinda bogus...
>
You're probably talking about IDNA (called iDNS before).
http://en.wikipedia.org/wiki/Internationalized_domain_name
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