Re-generate from gl_API.xml 1.65. This provides the missing bits for
GL_EXT_texture_filter_anisotropic and GL_EXT_blend_equation_separate.
Enable those extensions.
gl_API.xml 1.63 corrects some problems with GLX protocol for
GL_EXT_paletted_texture and GL_SGI_color_table. Regenerate from that
file, and enable those extensions and GL_EXT_shared_texture_palette.