UnixDomainSocketEndPoint Requirements on Windows Not Documented

[iUnknwn]

To use UnixDomainSocketEndPoint on Windows, the socket must be created with:

• AddressFamily.Unix
• SocketType.Stream
• ProtocolType.Unspecified

This isn't documented. Additionally, limitations of Unix domain sockets on Windows are also not documented (for example, you cannot have SOCK_DGRAM sockets on Windows (see dotnet/runtime#24065)

Would it be possible to update the UnixDomainSocketEndPoint documentation to list these requirements and limitations for Windows?

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