GL_EXT_multi_draw_arrays
http://oss.sgi.com/projects/ogl-sample/registry/EXT/multi_draw_arrays.txt
	void glMultiDrawArraysEXT (GLenum mode, GLint* first, GLsizei *count, GLsizei primcount)
	void glMultiDrawElementsEXT (GLenum mode, GLsizei* count, GLenum type, const GLvoid **indices, GLsizei primcount)