bug#73813: 30.0.91; icomplete-mode keymap unusable in xterm for for/backward completions

[Eli Zaretskii]

> From: Van Ly <van.ly@sdf.org>
> Cc: 73813@debbugs.gnu.org
> Date: Tue, 15 Oct 2024 14:07:00 +0000
> 
> Having in the documentation the need for xterm version 216 or later
> with setting "XTerm*VT100.modifyOtherKeys: 1" will help.

I don't know where to document this factoid.  I found it in the
comments inside xterm.el, and I supposed anyone else could find it
there.  Maybe we could add this to the Emacs FAQ?