Minor extension spec & header updates.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/doc/registry/public/api@23216 e7fa87d3-cd2b-0410-9028-fcbf551c1848
New NV ES extensions (Bug 10912).


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/doc/registry/public/api@23231 e7fa87d3-cd2b-0410-9028-fcbf551c1848