[Freeciv-Dev] (PR#9871) autosize parameter for mapgen

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=9871 >

Mapgen creates xsize and ysize from the server's "size" variable.

But civworld uses mapgen, and should be able to let the user set the 
sizes directly.  Adding a paramter to mapgen makes this easy.

Note to Mike: letting the user set xsize/ysize directly is dangerous. 
xsize and ysize don't do what you'd expect them to do in hex and iso 
topologies.  You might be better off letting the user set an integer (or 
floating-point) width and height, then dividing the width by sqrt(2) and 
multiplying the height by sqrt(2) (TF_HEX or TF_ISO).  Then they'll 
probably get about what they expect.

jason