Allow Ancillary (file desciriptors) data to be passed through UNIX sockets between Win32 apps and WSL

[felipealmeida]

Unfortunately, my other issue had a misleading title and was declared, wrongly, duplicated.

The goal is to allow third party (me) to port Wayland compositors from Linux to Windows.
I have a rudimentary Wayland server based on Vulkan API which I wanted to port to Windows, however, this is not possible AFAIU yet because of the above problem. My wayland server could be completely implemented on Win32 API (with Vulkan API) without any requirement of WSL, making it possible to create normal windows for WSL applications. However, the impossibility of passing memory shared segments makes this impossible to refresh buffers efficiently.

If there's a workaround to pass memory mapped segments between Win32 applications and WSL I'd love to hear and would consider a good enough workaround.