tamouse mailing lists wrote in post #1087487:
> Underscores aren't valid in domain names..., just a-z, 0-9, and -


1) See Brian Candler's informative post above mine.
2) URIs are used for more than just domains/http
3) There are *many* subdomains that use underscore across the web.
Fight them, not me.  I need to write software that works with those
subdomains.

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