bug#4816: change of coding system without inquiry

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: eisinger@informatik.uni-muenchen.de,  4816@debbugs.gnu.org, Eli Zaretskii 
> <eliz@gnu.org>
> Date: Thu, 27 Jun 2019 19:49:33 +0200
> 
> > FWIW, in the past users explicitly expressed annoyance by these
> > questions.  The request was to use the "native" encoding silently.  By
> > introducing back this question, we are restoring that annoyance.
> 
> Perhaps it's time to make a decision now -- to not add a change like this?

I'm still not convinced we need this.  But if people think otherwise,
we could have an opt-in feature to ask such questions.