RFR: 8371471: HttpClient: Log HTTP/3 handshake failures if logging errors is enabled [v3]

[Jaikiran Pai]

On Fri, 7 Nov 2025 15:30:20 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Surprisingly if the QUIC handshake fails exceptionally, and `-Djdk.httpclient.HttpClient.log=errors` is specified, the exception is not logged. This change fixes that.
>
> Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review feedback

test/jdk/java/net/httpclient/http3/H3LogHandshakeErrors.java line 151:

> 149:             System.out.println("Issuing request: " + req1);
> 150:             final HttpResponse<Void> resp1 = client.send(req1, BodyHandlers.discarding());
> 151:             Assert.assertEquals(resp1.statusCode(), 200, "unexpected response code for GET request");

Sorry I missed htis in the previous round of review. Shouldn't this line be a `fail("Request expected to fail but didn't")`?

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PR Review Comment: https://git.openjdk.org/jdk/pull/28196#discussion_r2504537116