Copyright (c) 2021 Reyk Floeter <contact@reykfloeter.com>

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

---

The `privsep/src/net/ancillary.rs` file is based on "unstable"
nightly-only code from the Rust std library
([original source](https://raw.githubusercontent.com/rust-lang/rust/master/library/std/src/sys/unix/ext/net/ancillary.rs)).
It is modified to work outside of the std library.

`ancillary.rs` is licensed under the MIT license:

Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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DEALINGS IN THE SOFTWARE.