Removal of glheaders in git

[Howard Goldstein]

Florent Thoumie wrote:
> I've removed glheaders in git cause it was half-baked and I don't want
> to merge it back into the freebsd ports tree.

With glheaders gone portupgrade nvidia-driver at the install loops 
forever as below:


===>  Installing for nvidia-driver-1.0.9746_3
===>   nvidia-driver-1.0.9746_3 depends on file: 
/compat/linux/etc/fedora-release - found
===>   nvidia-driver-1.0.9746_3 depends on file: 
/compat/linux/usr/X11R6/lib/libXrender.so.1 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: m.3 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: X11.6 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: GL.1 - not found
===>    Verifying reinstall for GL.1 in /usr/ports/x11/nvidia-driver
===>  Installing for nvidia-driver-1.0.9746_3
===>   nvidia-driver-1.0.9746_3 depends on file: 
/compat/linux/etc/fedora-release - found
===>   nvidia-driver-1.0.9746_3 depends on file: 
/compat/linux/usr/X11R6/lib/libXrender.so.1 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: m.3 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: X11.6 - found
===>   nvidia-driver-1.0.9746_3 depends on shared library: GL.1 - not found
===>    Verifying reinstall for GL.1 in /usr/ports/x11/nvidia-driver