Encoding of old compatibility characters

[Eli Zaretskii]

> From: Otto Stolz <otto.stolz at uni-konstanz.de>
> Date: Tue, 4 Apr 2017 15:21:02 +0200
> 
> Am 31.03.2017 um 09:57 schrieb Eli Zaretskii:
> > Arial Unicode MS supports that character [U+23E8], FWIW.
> 
> Not on my good ole Wndows XP SP3 system.

This here is also XP SP3.  Maybe some package I have installed updated
the font?