RFR: 8352706: httpclient HeadTest does not run on HTTP2

[Daniel Jeliński]

On Mon, 24 Mar 2025 11:34:23 GMT, Daniel Jeliński <djelinski at openjdk.org> wrote:

> The test was using incorrect URIs for testing, and as a result, the test was never run on HTTP2. Additionally, the HTTP2 test server was using an unconfigured SSLContext, and HTTPS was not usable. Both issues are fixed.
> 
> The test continues to pass.

Thanks for the review!

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PR Comment: https://git.openjdk.org/jdk/pull/24191#issuecomment-2753547852