[release/9.0] Fix Kestrel host header mismatch handling when port in Url #59362
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Backport of #59352 to release/9.0
/cc @BrennanConroy
Fix Kestrel host header mismatch handling when port in Url
Description
Fixes some validation of host headers in Kestrel if a non-default port is included in the request url.
Customer Impact
Valid requests will result in a 400 error response if they hit this case.
An internal partner team is hitting this currently.
Regression?
Risk
Small bug fix with additional unit test coverage to make sure it works and doesn't regress in the future.
Verification
Packaging changes reviewed?