make.conf no x option

[Randy Bush]

> Something like the following would work as a safety net.
> 
> --- /usr/ports/Mk/bsd.xorg.mk.orig	2009-05-26 13:42:52.000000000 +0100
> +++ /usr/ports/Mk/bsd.xorg.mk	2009-05-26 13:42:58.000000000 +0100
> @@ -28,6 +28,11 @@
>  # xserver - there's only one atm, I guess everything can fit into the
> port itself
> 
>  .if defined(XORG_CAT)
> +
> +. if defined(WITHOUT_X11)
> +IGNORE=		me not want x11
> +. endif
> +
>  # Default variables, common to all new modular xorg ports.
>  .if !defined(USE_TGZ)
>  USE_BZIP2=    	yes

looks useful.

i think this whole thing is worth a few days to settle in our heads.
essentially, if we believe that freebsd is used extensively in headless
server deployments, we should make that easy and smooth.

randy