Github user afs commented on the issue:
https://github.com/apache/jena/pull/151
I came across "preemptive authentication" for HttpClient which apparently
does not a preconfigured `HttpClient`.
[HttpComponents 4.5.x tutorial section,
4.6](https://hc.apache.org/httpcomponents-client-4.5.x/tutorial/html/authentication.html#d5e717)
It works pre-populating the authentication data cache and calling:
```
CloseableHttpResponse response = httpclient.execute(target, http-request,
HttpClientContext);
```
It's not quite the style of
`org.apache.jena.atlas.web.auth.HttpAuthenticator` but it's close.
Would this be better than `HttpClientBuilder`+`HttpAuthenticator`? Mu
first impression is that it is much the same - just different.
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