Need review for #3180 please

[Kean Johnston]

>  - programs/Xserver/hw/xfree86/parser/Monitor.c:  I'm curious
>    why you change the default for SCO to uncommenting the monitor
>    ranges by default - seems strange to be a OS-specific option.
PS I remember now why I made this change :)
Without it, using xorgcfg, if you set horizontal and vertical
ranges, they get ignored becuase they are written out as
comments.

Kean