Summary:
When I was trying to use `nix::unistd::gethostname` in D39783468, the version `0.23.0` will require users to pass in a `buf` as a parameter, however, in `0.25.0`, there is no need to pass in a `buf` as a parameter. Hence, I would love to update `nix` crate from `0.23` to `0.25` in order to not pass a redundant `buf` while calling `nix::unistd::gethostname`.
I fixed conflicts reflected from the signals manually so this diff is more than a few lines of code in `Cargo.toml`.
Here are the [changes](https://github.com/nix-rust/nix/compare/v0.23.0..v0.25.0) between `0.23` and `0.25`. See `CHANGELOG.md` for the most significant changes in this version.
Reviewed By: bgw
Differential Revision: D39919100
fbshipit-source-id: 7f62585ff72230bd2608aeb5a4780dc0128795f7
Summary: D39418421 (8fef664fab) prematurely upgraded `thiserror`. Various projects in fbcode use nightly features including std::backtrace but the current fbcode Rust toolchain is 1.63.0, in which the backtrace API is different from the API of the latest nightlies.
Reviewed By: quark-zju
Differential Revision: D39562441
fbshipit-source-id: d1f8a993ec776cf82b1736b242bd4466def21230
