Installer of 20210225 snapshot works with monochrome mode

[Yasuhiro Kimura]

From: Yasuhiro Kimura <yasu at utahime.org>
Subject: Installer of 20210225 snapshot works with monochrome mode
Date: Tue, 02 Mar 2021 16:02:37 +0900 (JST)

> I created VirtualBox VM on Windows host and tried to make clean
> install of 14-CURRENT with iso image of 20210225 snapshot
> (FreeBSD-14.0-CURRENT-amd64-20210225-bf667f282a7-256946-disc1.iso). Then
> installer worked with monochrome mode as following.
> 
> https://www.utahime.org/FreeBSD/install-snapshot-020210225.01.png
> https://www.utahime.org/FreeBSD/install-snapshot-020210225.02.png
> https://www.utahime.org/FreeBSD/install-snapshot-020210225.03.png
> 
> If I start `bsdinstall` after installation is completed, then it works
> normal color mode. So it seems bug of install image.

I tried 20210218 snapshot and the problem didn't happen. So I'm now
bisecting and will report which commit causes it.

---
Yasuhiro Kimura