bug#24443: 24.5; Feature: C-n and C-p to move logically while DOWN and UP move physically

[Eli Zaretskii <eliz@gnu.org>]

> From: Ed Avis <eda@waniasset.com>
> Date: Thu, 15 Sep 2016 13:56:39 +0100
> 
> Could I suggest that it might make sense for the more 'expert'
> keystrokes C-n and C-p to default to logical line movement, while DOWN
> and UP continue to move visually?  Most people who use C-n and C-p will
> be Emacs old-timers and remember the logical movement, or at least
> understand how to rebind the keys to switch them to visual movement.
> This way, rather than two key bindings for the same thing, the different
> kinds of line movement both have a key binding.

This could be a global minor mode, by default off.  I don't think we
can make this the default behavior after so many years of the current
behavior.

Note that this will also contradict the tutorial, which currently says
the arrow keys move the same as C-n/C-p.

Thanks.