GLUT: Fix mistake in header license

* We felt that me adding this didn't really
properly communicate the spirit of the
email approval. You really can't just
'change' a license from MIT without author
approval... so this is superfluous.

GLUT: Relicense Mark Kilgard's GLUT components

* A copy of the email approving this change is
in the LICENSE.txt file
* This clears up several concerns
* We now have permission to clean / update GLUT
code and redistrubute its binaries.
* We have to ensure all of Mark's work is *not*
GPL licensed as per his wishes.

Break glut out from mesa lib

As glut is no longer in upstream Mesa and no longer developed
we will need to keep a fork.

GLUT: Fix mistake in header license

* We felt that me adding this didn't really
properly communicate the spirit of the
email approval. You really can't just
'change' a license from MIT without author
approval... so this is superfluous.

GLUT: Relicense Mark Kilgard's GLUT components

* A copy of the email approving this change is
in the LICENSE.txt file
* This clears up several concerns
* We now have permission to clean / update GLUT
code and redistrubute its binaries.
* We have to ensure all of Mark's work is *not*
GPL licensed as per his wishes.

Break glut out from mesa lib

As glut is no longer in upstream Mesa and no longer developed
we will need to keep a fork.