bug#22110: True color support

[Eli Zaretskii]

> From: Eric Becker <121onto@gmail.com>
> Date: Mon, 7 Dec 2015 08:56:59 -0800
> 
> Many modern themes rely on true color support. Unfortunately, terminal emacs
> does not support true colors. There are patches available:
> 
> https://github.com/zenorocha/dracula-theme/issues/116
> 
> This patch appears to be no more than a few lines of code.

It's much more than just a few lines.  I also don't quite understand
why xfaces.c needs to be changed and would like to avoid that if
possible.

> Why not integrate true color support into the next release of emacs? 

I was in the middle of discussing this 2 years ago, when the
discussion stalled.  I hope the author will come back, rebase his
patch, and continue the discussion where we left off back then.