1401 and NVIDIA driver 2.4.4

• Hardware H.264 and HEVC encode on every GTX 16 card: GTX 1650, 1650 SUPER, 1660, 1660 SUPER and 1660 Ti use the same encoders as RTX 20.
• HEVC encode on GTX 16 and RTX 20 cards keeps going past the second frame; it stopped with an error from frame 2 on.
• Laptops whose screen is on the Intel or AMD GPU offer the NVIDIA Metal device about 8 seconds after startup instead of 60, so apps opened at login see it too.
• WindowServer no longer crashes in the Vulkan driver when a binding holds a handle that cannot be a live object: the slot gets a placeholder and the log names it. Two RTX 3060 machines restarted WindowServer a few seconds after each login on this.
• An app no longer freezes for good when one finished GPU job is missing its completion mark (#322): Terminal and iTerm2 printing fast stopped redrawing and taking input until force-quit.
• Shaders that call functions through a visible or intersection function table load again; they returned nothing since 2.3.6 (PR #318, thanks watchthelight).
• World of Warcraft starts again: since 2.3.6 it showed a black screen and "unable to start up 3D acceleration", and once past that the terrain lighting shader faulted (PR #304, thanks razvanccr).
• Apps built on wgpu (Tern and others) start again: a fragment shader that clears the padding of a local struct failed to translate and the app stopped at launch (#330).