bug#67638: Description of the variable message-mail-user-agent in Emacs 29.1

[Eli Zaretskii]

> Date: Fri, 08 Dec 2023 14:37:30 +0000
> From: rameiko87@posteo.net
> Cc: 67638@debbugs.gnu.org
> 
> >> Do you think this is correct?
> > 
> > Almost.  In case B.1 we do involve mail-user-agent: message.el binds 
> > its value to what message-mail-user-agent tells it.  IOW, the 
> > lower-level functionality of composing and sending email always looks 
> > at mail-user-agent, so any package that wants to override the value of 
> > mail-user-agent must bind it to some other value.
> 
> Wait up I disagree

Noted.