bug#1721: 23.0.60; visual-line-mode under terminal (-nw) makes arrow keys not working

[Chong Yidong]

> Under terminal (emacs -nw), the visual-line-mode maps the arrow key
> wrongly.
> <up> -> A M-[
> <down> -> B M-]
> <left> -> D
> <right> -> C
> and it also maps the mouse-key of xterm-mouse-mode wrongly.
>
> turn the visual-line-mode off will back everything to normal.

This bug report is unclear, and I can not reproduce any bug with
visual-line-mode under emacs -nw.  Please provide a *precise* recipe for
seeing this bug, starting with `emacs -Q -nw'.