Update Rust crate nix to 0.30 (#742)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [nix](https://redirect.github.com/nix-rust/nix) |
workspace.dependencies | minor | `0.29` -> `0.30` |

---

### Release Notes

<details>
<summary>nix-rust/nix (nix)</summary>

###
[`v0.30.1`](https://redirect.github.com/nix-rust/nix/blob/HEAD/CHANGELOG.md#0301---2025-05-04)

[Compare
Source](https://redirect.github.com/nix-rust/nix/compare/v0.30.0...v0.30.1)

##### Fixed

-   doc.rs build
    ([#&#8203;2634](https://redirect.github.com/nix-rust/nix/pull/2634))

###
[`v0.30.0`](https://redirect.github.com/nix-rust/nix/blob/HEAD/CHANGELOG.md#0300---2025-04-29)

[Compare
Source](https://redirect.github.com/nix-rust/nix/compare/v0.29.0...v0.30.0)

##### Added

-   Add socket option `IPV6_PKTINFO` for BSDs/Linux/Android, also
    `IPV6_RECVPKTINFO` for DragonFlyBSD
    ([#&#8203;2113](https://redirect.github.com/nix-rust/nix/pull/2113))
-   Add `fcntl`'s `F_PREALLOCATE` constant for Apple targets.
    ([#&#8203;2393](https://redirect.github.com/nix-rust/nix/pull/2393))
- Improve support for extracting the TTL / Hop Limit from incoming
packets
    and support for DSCP (ToS / Traffic Class).
    ([#&#8203;2425](https://redirect.github.com/nix-rust/nix/pull/2425))
- Add socket option IP_TOS (nix::sys::socket::sockopt::IpTos)
IPV6\_TCLASS
    (nix::sys::socket::sockopt::Ipv6TClass) on Android/FreeBSD
    ([#&#8203;2464](https://redirect.github.com/nix-rust/nix/pull/2464))
-   Add `SeekData` and `SeekHole` to `Whence` for hurd and apple targets
    ([#&#8203;2473](https://redirect.github.com/nix-rust/nix/pull/2473))
-   Add `From` trait implementation between `SocketAddr` and `Sockaddr`,
`Sockaddr6`
([#&#8203;2474](https://redirect.github.com/nix-rust/nix/pull/2474))
-   Added wrappers for `posix_spawn` API
    ([#&#8203;2475](https://redirect.github.com/nix-rust/nix/pull/2475))
-   Add the support for Emscripten.
    ([#&#8203;2477](https://redirect.github.com/nix-rust/nix/pull/2477))
-   Add fcntl constant `F_RDADVISE` for Apple target
    ([#&#8203;2480](https://redirect.github.com/nix-rust/nix/pull/2480))
-   Add fcntl constant `F_RDAHEAD` for Apple target
    ([#&#8203;2482](https://redirect.github.com/nix-rust/nix/pull/2482))
-   Add `F_LOG2PHYS` and `F_LOG2PHYS_EXT` for Apple target
    ([#&#8203;2483](https://redirect.github.com/nix-rust/nix/pull/2483))
- `MAP_SHARED_VALIDATE` was added for all linux targets. & `MAP_SYNC`
was added
    for linux with the exclusion of mips architecures, and uclibc
    ([#&#8203;2499](https://redirect.github.com/nix-rust/nix/pull/2499))
-   Add `getregs()`/`getregset()`/`setregset()` for Linux/musl/aarch64
    ([#&#8203;2502](https://redirect.github.com/nix-rust/nix/pull/2502))
-   Add FcntlArgs `F_TRANSFEREXTENTS` constant for Apple targets
    ([#&#8203;2504](https://redirect.github.com/nix-rust/nix/pull/2504))
-   Add `MapFlags::MAP_STACK` in `sys::man` for netbsd
    ([#&#8203;2526](https://redirect.github.com/nix-rust/nix/pull/2526))
-   Add support for `libc::LOCAL_PEERTOKEN` in `getsockopt`.
    ([#&#8203;2529](https://redirect.github.com/nix-rust/nix/pull/2529))
-   Add support for `syslog`, `openlog`, `closelog` on all `unix`.
    ([#&#8203;2537](https://redirect.github.com/nix-rust/nix/pull/2537))
-   Add the `TCP_FUNCTION_BLK` sockopt, on FreeBSD.
    ([#&#8203;2539](https://redirect.github.com/nix-rust/nix/pull/2539))
- Implements `Into<OwnedFd>` for
`PtyMaster/Fanotify/Inotify/SignalFd/TimerFd`
    ([#&#8203;2548](https://redirect.github.com/nix-rust/nix/pull/2548))
- Add `MremapFlags::MREMAP_DONTUNMAP` to `sys::mman::mremap` for linux
target.
    ([#&#8203;2555](https://redirect.github.com/nix-rust/nix/pull/2555))
- Added `sockopt_impl!` to the public API. It's now possible for users
to
    define
    their own sockopts without needing to make a PR to Nix.
    ([#&#8203;2556](https://redirect.github.com/nix-rust/nix/pull/2556))
-   Add the `TCP_FUNCTION_ALIAS` sockopt, on FreeBSD.
    ([#&#8203;2558](https://redirect.github.com/nix-rust/nix/pull/2558))
- Add `sys::mman::MmapAdvise` `MADV_PAGEOUT`, `MADV_COLD`,
`MADV_WIPEONFORK`,
    `MADV_KEEPONFORK` for Linux and Android targets
    ([#&#8203;2559](https://redirect.github.com/nix-rust/nix/pull/2559))
- Add socket protocol `Sctp`, as well as `MSG_NOTIFICATION` for
non-Android
Linux targets.
([#&#8203;2562](https://redirect.github.com/nix-rust/nix/pull/2562))
-   Added `from_owned_fd` constructor to `EventFd`
    ([#&#8203;2563](https://redirect.github.com/nix-rust/nix/pull/2563))
- Add `sys::mman::MmapAdvise` `MADV_POPULATE_READ`,
`MADV_POPULATE_WRITE` for
    Linux and Android targets
    ([#&#8203;2565](https://redirect.github.com/nix-rust/nix/pull/2565))
-   Added `from_owned_fd` constructor to
    `PtyMaster/Fanotify/Inotify/SignalFd/TimerFd`
    ([#&#8203;2566](https://redirect.github.com/nix-rust/nix/pull/2566))
-   Added `FcntlArg::F_READAHEAD` for FreeBSD target
    ([#&#8203;2569](https://redirect.github.com/nix-rust/nix/pull/2569))
-   Added `sockopt::LingerSec` for Apple targets
    ([#&#8203;2572](https://redirect.github.com/nix-rust/nix/pull/2572))
-   Added `sockopt::EsclBind` for solarish targets
    ([#&#8203;2573](https://redirect.github.com/nix-rust/nix/pull/2573))
-   Exposed the `std::os::fd::AsRawFd` trait method for
    `nix::sys::fanotify::Fanotify` struct
    ([#&#8203;2575](https://redirect.github.com/nix-rust/nix/pull/2575))
-   Add support for syslog's `setlogmask` on all `unix`.
    ([#&#8203;2579](https://redirect.github.com/nix-rust/nix/pull/2579))
-   Added Fuchsia support for `ioctl`.
    ([#&#8203;2580](https://redirect.github.com/nix-rust/nix/pull/2580))
-   Add `sys::socket::SockProtocol::EthIp`,
    `sys::socket::SockProtocol::EthIpv6`,
    `sys::socket::SockProtocol::EthLoop`
    ([#&#8203;2581](https://redirect.github.com/nix-rust/nix/pull/2581))
-   Add OpenHarmony target into CI and Update documents.
    ([#&#8203;2599](https://redirect.github.com/nix-rust/nix/pull/2599))
-   Added the TcpMaxSeg `setsockopt` option for apple targets
    ([#&#8203;2603](https://redirect.github.com/nix-rust/nix/pull/2603))
-   Add `FilAttach` and `FilDetach` to socket::sockopt for Illumos
    ([#&#8203;2611](https://redirect.github.com/nix-rust/nix/pull/2611))
-   Add `PeerPidfd` (`SO_PEERPIDFD`) to `socket::sockopt` for Linux
    ([#&#8203;2620](https://redirect.github.com/nix-rust/nix/pull/2620))
-   Added `socket::sockopt::AttachReusePortCbpf` for Linux
    ([#&#8203;2621](https://redirect.github.com/nix-rust/nix/pull/2621))
-   Add `ptrace::syscall_info` for linux/glibc
    ([#&#8203;2627](https://redirect.github.com/nix-rust/nix/pull/2627))

##### Changed

-   Module sys/signal now adopts I/O safety
    ([#&#8203;1936](https://redirect.github.com/nix-rust/nix/pull/1936))
- Change the type of the `name` argument of `memfd_create()` from
`&CStr` to
`<P: NixPath>(name: &P)`
([#&#8203;2431](https://redirect.github.com/nix-rust/nix/pull/2431))
-   Public interfaces in `fcntl.rs` and `dir.rs` now use I/O-safe types.
    ([#&#8203;2434](https://redirect.github.com/nix-rust/nix/pull/2434))
-   Module `sys/stat` now adopts I/O safety.
    ([#&#8203;2439](https://redirect.github.com/nix-rust/nix/pull/2439))
-   Module unistd now adopts I/O safety.
    ([#&#8203;2440](https://redirect.github.com/nix-rust/nix/pull/2440))
-   Module sys/fanotify now adopts I/O safety
    ([#&#8203;2443](https://redirect.github.com/nix-rust/nix/pull/2443))
- Socket option `IpTos` has been renamed to `Ipv4Tos`, the old symbol is
deprecated since 0.30.0
([#&#8203;2465](https://redirect.github.com/nix-rust/nix/pull/2465))
- Rename Flags `EventFlag` to `EvFlags`, and `MemFdCreateFlag` to
`MFdFlags`
    ([#&#8203;2476](https://redirect.github.com/nix-rust/nix/pull/2476))
-   Made `nix::sys::socket::UnknownCmsg` public and more readable
    ([#&#8203;2520](https://redirect.github.com/nix-rust/nix/pull/2520))
-   recvmsg: take slice for cmsg_buffer instead of Vec
    ([#&#8203;2524](https://redirect.github.com/nix-rust/nix/pull/2524))
-   linkat: allow distinct types for path arguments
    ([#&#8203;2582](https://redirect.github.com/nix-rust/nix/pull/2582))

##### Fixed

-   Disable unsupported signals on sparc-linux
    ([#&#8203;2454](https://redirect.github.com/nix-rust/nix/pull/2454))
-   Fix cmsg_len() return type on OpenHarmony
    ([#&#8203;2456](https://redirect.github.com/nix-rust/nix/pull/2456))
- The `ns` argument of `sys::prctl::set_timerslack()` should be of type
`c_ulong`
([#&#8203;2505](https://redirect.github.com/nix-rust/nix/pull/2505))
- Properly exclude NUL characters from `OSString`s returned by
`getsockopt`.
    ([#&#8203;2557](https://redirect.github.com/nix-rust/nix/pull/2557))
-   Fixes the build on OpenHarmony
    ([#&#8203;2587](https://redirect.github.com/nix-rust/nix/pull/2587))

##### Removed

- Type `SigevNotify` is no longer `PartialEq`, `Eq` and `Hash` due to
the use
of `BorrowedFd`
([#&#8203;1936](https://redirect.github.com/nix-rust/nix/pull/1936))
- `EventFd::defuse()` is removed because it does nothing,
`EventFd::arm()` is
    also removed for symmetry reasons.
    ([#&#8203;2452](https://redirect.github.com/nix-rust/nix/pull/2452))
-   Removed the `Copy` trait from `PollFd`
    ([#&#8203;2631](https://redirect.github.com/nix-rust/nix/pull/2631))

</details>

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Cargo.lock

@@ -55,7 +55,7 @@ ipnetwork = { version = "0.21", default-features = false }
 itertools = { version = "0.14", default-features = false }
 libc = "0.2"
 libnet = { git = "https://github.com/oxidecomputer/netadm-sys", branch = "main" }
-nix = { version = "0.29", features = ["signal", "user"] }
+nix = { version = "0.30", features = ["signal", "user"] }
 pcap-parser = "0.16"
 postcard = { version = "1", features = ["alloc"], default-features = false }
 proc-macro2 = { version = "1" }