GL_3DFX_multisample
http://www.opengl.org/registry/specs/gl/3DFX/3dfx_multisample.txt
GL_3DFX_multisample
	GL_MULTISAMPLE_3DFX 0x86B2
	GL_SAMPLE_BUFFERS_3DFX 0x86B3
	GL_SAMPLES_3DFX 0x86B4
	GL_MULTISAMPLE_BIT_3DFX 0x20000000