bug#47806: 28.0.50; `make-frame` frame should probably clone the `environment` parameter into the new frame

[Eli Zaretskii]

> From: Thibault Polge <thibault@thb.lt>
> Date: Thu, 15 Apr 2021 20:28:59 +0200
> 
> Frames created by `emacsclient` get a copy of the caller's environment
> variables in the `environment` frame property.  But frames created from
> other frames (with C-x 5 2, `make-frame`, `make-frame-command`, and so
> on) don't get a copy of those variables (they don't have an
> `environment` frame parameter at all). I believe they should.

How do we know whether a particular frame should or shouldn't have the
'environment' frame parameter?  When the frame is created by the
server on behalf of a client, we know.  But for a random
frame-creation function, how do we know?

> My use case is talking to the WM, and without this parameter I believe
> it's impossible to distinguish between, eg, frames managed by different
> X servers on the same daemon.

Doesn't the 'display' parameter fit the bill?