Heads Up: X11BASE removal

[Eitan Adler]

Hi porters,

The X11BASE variable has been deprecated for a long time. Support for
having a X11BASE different than LOCALBASE was terminated on
2009/12/18. After the 9.0 release I will commit a patch that removes
all current references of the variable from bsd.port.mk and
bsd.xorg.mk.  In the meantime I will be adding some helper code to a
few ports that still depend on it. New ports should not reference
X11BASE at all.

Thanks,
Eitan Adler