[Bug 120061] unix.7: Extend notes about ignored permissions for UNIX domain sockets

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org]

https://bugzilla.kernel.org/show_bug.cgi?id=120061

--- Comment #2 from Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
For now, I have applied the patch below. Maybe I will do more, depending on
further info that you can supply.

--- a/man7/unix.7
+++ b/man7/unix.7
@@ -232,7 +232,7 @@ connecting to a stream socket object requires write
permission on that socket;
 sending a datagram to a datagram socket likewise
 requires write permission on that socket.
 POSIX does not make any statement about the effect of the permissions
-on a socket file, and on many systems (e.g., several BSD derivatives),
+on a socket file, and on some systems (e.g., older BSDs),
 the socket permissions are ignored.
 Portable programs should not rely on
 this feature for security.

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