Validate IPv6 addresses in urls

[erikdubbelboer]

No description provided.

[Copilot]

Pull Request Overview

This pull request adds IPv6 address validation to URL parsing to prevent invalid IPv6 literals from being accepted. The implementation validates IPv6 addresses in square brackets within host parts of URLs, ensuring proper format and rejecting malformed addresses that could potentially be used for security exploits.

• Implements comprehensive IPv6 literal validation with custom parsing logic
• Adds validation call to the existing parseHost function in the URI parsing flow
• Includes extensive test coverage with both unit tests and fuzz testing

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
uri.go	Integrates IPv6 validation into existing host parsing logic
ipv6.go	Implements IPv6 literal validation with custom parsing for both pure IPv6 and IPv4-embedded formats
ipv6_test.go	Provides fuzz testing with oracle function to validate implementation correctness
uri_test.go	Adds test cases for both valid and invalid IPv6 URLs to ensure proper rejection

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[Copilot]

The function b2s is used but not defined in this file or imported. This will cause a compilation error.