Configure proxy for the Kerberos client

[oleksandrkorzhenevskyi]

Description

Sarama client allows setting the proxy dialer. Our customer has the following setup:

• Kafka cluster behind a proxy;
• Kerberos server also behind the same proxy.

The problem is that the Kerberos library that you use does not allow setting a dialer.
I have created an issue jcmturner/gokrb5#548, and also a pull request (I am working on unit tests, but the logic is tested with the real system). I will also prepare a pull request for your repository.

My concern is that the last commit that reached master in the Kerberos repository is from the last year. And the owner of the repository does not seem to be active in any discussions there. For example, there is an issue from your team jcmturner/gokrb5#544 that is from May, and you got no answer, as far as I know.
Did you consider to fork this repository and have it under your control? Or use any of forks? For example, there is a fork maintained by Grafana https://github.com/grafana/gokrb5. We may have a better support there.

What would you say? How could we proceed to bring required changes in?

[github-actions]

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