Legacy: setting "Auto set resolution" about grafx2 HOT 16 OPEN

Set to low (All the 'Legacy' are reminders of things that might be removed)

I plan to add some modes with rectangles pixels for Amstrad CPC graphists. this
computers has strange screenmodes with 2:1 or 1:2 aspect ratio. Don't know if 
this
option will be usefull, but it may be handy to have it around ...

The idea is to have a X and a Y zoom factor for the picture even in non-zoomed 
mode.
Some people also requested to have a zoom like that for LCD that can't stretch 
the
picture.

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This setting could be used to scale the window up when loading a picture.

I agree that this feature is of very limited usability (since you can always 
just
change the resolution yourself). But you can still use any resolution you want 
even
on a modern computer (at least if it's running Linux and you have a working 
driver).
And if all the resolutions you use have the same frequency you smoothly and 
instantly
change between them without flicker (which hasn't always been possible). So this
feature is at least as useful now as it has ever been.

Here is how you use 320x400 at, let's say, 80Hz in X (XFree86 or Xorg on any
platform). Add the following line to the monitor section:

Modeline "320x400" 14.83 320 352 408 440 400 407 413 421

And to test it without restarting X you can run:

xinit /path/to/grafx2 -- /usr/bin/X :1

In fact this resolution will work better than 320x200 in most cases since some 
newer
graphic interfaces can't do doublescan (draw each line twice to avoid so called
scanlines) and using it without doublescan will either result in a horizontal 
sync
frequency too low or a refresh rate too high for most monitors to handle (as 
well as
scanlines of course).

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Arbitering issues that make it to v2.4