[PATCH 0/2] MR5267: ntdll, server: Remove support for msg_accrights FD passing.

[Brendan Shanks (＠bshanks)]

`msghdr.msg_accrights` was the [4.3BSD mechanism](https://man.freebsd.org/cgi/man.cgi?query=recv&apropos=0&sektion=2&a...) for passing FDs over a Unix domain socket, it's now long obsolete.
The only recent OS where it's still available is Solaris, but that's also supported `msg_control` for decades (although additional `#defines` were required pre-11.4).