bug#51733: 27.1; Detect impossible email addresses better

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 51733@debbugs.gnu.org,  jidanni@jidanni.org
> Date: Sun, 16 Jan 2022 17:09:38 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > unicode-security.el?  I mean, most of that _is_ based on Unicode
> > recommendations, right?
> 
> Most of it is, but not all.  And putting "unicode" in the function names
> wouldn't be helpful, because it's not important to the people using
> these functions that most of the recommendations come from Unicode.

You are a tough customer.

Then what about text-security.el? or textsec.el?