is the version. There are three types of compressed archives.
</p>
<p>
-There's also the MesaGLUT-x.y.z.{tar.bz2, tar.gz, zip} packages which
-contain Mark Kilgard's GLUT library.
-This is optional.
+In the past, there was also MesaGLUT-x.y.z.{tar.bz2, tar.gz, zip} packages which
+contained Mark Kilgard's GLUT library.
Most Linux distributions include an implementation of GLUT (such as freeglut).
</p>
<p>