Merge branch 'changelog-2' into 'main'

This file describes changes in Arti through the current release.  Once Arti

is more mature, we may switch to using a separate changelog for each crate.

# UNRELEASED - CONTAINS CHANGES UP TO d271ceb3514394b53959619aef1ec13212e80a23

# Arti 1.4.0 — 7 February 2025

TODO - also, not yet in the final (\[...], \[...]) format.

  !2720

  !2760

  #1832

  !2768

  !2765

- Improved CLI and add config loading.

  !2699

  #1736

  !2709

- High-level certificate types (implementing `ToEncodableCert`)

  in `tor-relay-crypto`

  in `tor-relay-crypto`.

  !2672

  #1777

- Initial [KIST] support (Linux-only) in `tor-proto`.

  #1728

  #1729

  #1730

- Congestion control (prop324)

- Congestion control.

  [proposal 324]

  !2675 

  #534

- Apply the standard lint block.

### RPC development

- Cookie authentication

- Cookie authentication.

  !2702

  #1529

  !2716

  #1826

  !2744

  #1826

- `fs-mistrust`: New facilities for file access 

- `fs-mistrust`: New facilities for file access.

  !2707

  #1746

- Clarify and fix some issues surrounding relative paths. 

- Document stream optimism. 

  !2753 

  #1583

- Specify the RPC connection banner format

- Specify the RPC connection banner format.

  !2700

  #1753

### Hidden services development

### Other development

- Update plan for Proof of Work DoS prevention, `service-side-pow.md`.

  !2701

- Design notes for implementation of [Conflux].

  !2750

### Documentation

- Rewrite download manager example 

- Rewrite download manager example.

  !2725

  #1471

  #1386

  #1808

- `tor-config`: clarify that `ConfigurationSources::set_mistrust`is

  unrelated to the paths defined within the configuration file itself,

  and reference `storage.permissions.dangerously_trust_everyone`:

  and reference `storage.permissions.dangerously_trust_everyone`.

  !2727

- Integrate the Docusaurus-based documentation overhaul

  (aka [`arti-doc-project-2023`]) into `arti.git/web/`

  !2698

- `tor-proto`: Make `Channel::wait_for_close` non-experimental.

  !2666

- Fix non-Unix build and test failures

- Fix non-Unix build and test failures.

  !2615

  !2738

  #1809

  !2717

- Fix many typos

- Replace an async `Mutex` with a sync one in file watcher.

  !2763

- Remove confusing `use asynchronous_codec as futures_codec`

  #1690

  !2769

- Fix many typos.

  !2751

### Testing

- `tor-proto`: Fix flaky test `invalid_circ_sendme` by using

  `MockExecutor` and replacing `sleep()` with `advance_until_stalled()`.

  !2721

- More uniform handling of some test key data.

  !2764

  #1396

### Infrastructure

- `maint/matrix-check`: properly find the crate subdir.

  !2762

- Un-ignore [RUSTSEC-2024-0421] as we no longer use an affected `hickory`

- Un-ignore [RUSTSEC-2024-0421] as we no longer use an affected `hickory`.

  !2693

  #1773

- Update our main CI image (`RECENT_RUST_IMAGE`) to 1.83. 

  !2739

  !2616

### Acknowledgments

Thanks to everybody who's contributed to this release, including

Dimitris Apostolou, hhamud, Neel Chauhan and tidely.

Also, our deep thanks to

[Zcash Community Grants],

the [Bureau of Democracy, Human Rights and Labor],

and our [other sponsors]

for funding the development of Arti!

[Bureau of Democracy, Human Rights and Labor]: https://www.state.gov/bureaus-offices/under-secretary-for-civilian-security-democracy-and-human-rights/bureau-of-democracy-human-rights-and-labor/

[Conflux]: https://spec.torproject.org/proposals/329-traffic-splitting.html

[KIST]: https://blog.torproject.org/kist-and-tell-tors-new-traffic-scheduling-feature/

[RPC interface]: https://gitlab.torproject.org/tpo/core/arti/-/tree/main/doc/dev/rpc-book/src

[RUSTSEC-2024-0421]: https://rustsec.org/advisories/RUSTSEC-2024-0421.html

[Zcash Community Grants]: https://zcashcommunitygrants.org/

[`arti-doc-project-2023`]: https://gitlab.torproject.org/tpo/core/arti-doc-project-2023/

[control port]: https://spec.torproject.org/control-spec/index.html

[other sponsors]: https://www.torproject.org/about/sponsors/

[proposal 324]: https://spec.torproject.org/proposals/324-rtt-congestion-control.html