docs/relnotes/new_features.txt

   1 GL_ARB_gl_spirv on i965, iris.
   2 GL_ARB_spirv_extensions on i965, iris.
   3 GL_EXT_demote_to_helper_invocation on iris, i965.
   4 OpenGL 4.6 on i965, iris.
   5 VK_KHR_shader_clock on Intel, RADV.
   6 VK_KHR_shader_float_controls on Intel.
   7 VK_EXT_shader_subgroup_ballot on Intel.
   8 VK_EXT_shader_subgroup_vote on Intel.
   9 VK_EXT_texel_buffer_alignment on RADV.