Oleg Kalnichevski

@stoty Please disable `japicmp` for now and make changes to `HttpAuthenticator ` you deem necessary. I will take it from there.

> @michael-o, @ok2c > > Now that the festive sesason is over, are you able to find the time for reviews ? > > On my side, I still need...

> So the first patch would be most of this patch, without the actual MutualSPnego implementation, and corresponding new test, while the second one would add the new MutualSpnego implementation...

@stoty I cannot contribute here much. My only wish, and I understand it is a big ask, to also create a compatibility test similar to those we have for BASIC...

> I was afraid you're going to say that... @stoty Kek. Anyways, We already test for compatibility with Jetty in core by running it in a Docker container https://github.com/apache/httpcomponents-core/blob/master/httpcore5-testing/src/test/java/org/apache/hc/core5/testing/compatibility/JettyCompatIT.java I...

@michael-o Any chance this feature could make it into 5.6?

> > @michael-o Any chance this feature could make it into 5.6? > > Do you have a timeframe for 5.6? @michael-o I would like to release 5.6-alpha1 next week....

@arturobernalg Would it be OK for you to move implementation classes to `impl` package? It would make it easier to focus on the publicly visible APIs.

@arturobernalg What is your motivation for proposing this new module? Do you have an application that would be using it? Is there any chance of someone else contributing to it...

@arturobernalg The proposed solution may solve the problem at the cost of using an extra thread per message exchange but the objective of [HTTPCLIENT-1074](https://issues.apache.org/jira/browse/HTTPCLIENT-1074) was completely different. The idea is...