[z-machine] "State of play" for restart/restore

[David Kinder]

>From Amir Karger:
> OK. Let's ask the question differently. Given that the spec says what
> is saved, but dzip and rezrov seem to re-startup a number of GUI
> things... what's the Z-machine wisdom on what are good things to
> restart and what things should be left alone during a restart? Or does
> it totally depend on your particular interpreter?

My reading of the spec is that anything not explicity mentioned in "the
state of play" should be left alone.

David