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Add check for bad ports to http_fetch(), return NetworkError::Internal if bad port/schema combination is seen.
Test added
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<!-- 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#14514 (github issue number if applicable).
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- [x] There are tests for these changes OR
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Source-Repo: https://github.com/servo/servo
Source-Revision: de7d73adb0a51627e4aaa568787fe36c22029bd3