bug#51733: 27.1; Detect impossible email addresses better

[Eli Zaretskii]

> Date: Sun, 16 Jan 2022 20:14:08 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 51733@debbugs.gnu.org, jidanni@jidanni.org
> 
> > (elt char-script-table #xAB65)
> > => latin
> > 
> > which is wrong, because that's
> > 
> > GREEK LETTER SMALL CAPITAL OMEGA

Btw, this is not necessarily an error, because the Latin language did
have the omega letter.  It's not an accident this character is in a
Latin block.