Auto merge of #11513 - fduraffourg:pr11216, r=jdm

Add mach command to update public domain list and use a HashSet for matching

<!-- Please describe your changes on the following line: -->
Add a `mach update-pub-domains` command that update the public domain list used by servo.
Replace the Vec matching with a HashSet which is way quicker.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #11216

<!-- Either: -->
- [X] There are tests for these changes OR
- [ ] These changes do not require tests because _____

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/11513)
<!-- Reviewable:end -->

0 files changed, 0 insertions, 0 deletions