git: openjdk/jdk11u-dev: 8255227: java/net/httpclient/FlowAdapterPublisherTest.java intermittently failing with TestServer: start exception: java.io.IOException: Invalid preface

[Goetz Lindenmaier]

Changeset: cb4e2876
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2021-09-28 12:32:57 +0000
URL:       https://git.openjdk.java.net/jdk11u-dev/commit/cb4e2876265bdc72b25c0624338256e197b542f4

8255227: java/net/httpclient/FlowAdapterPublisherTest.java intermittently failing with TestServer: start exception: java.io.IOException: Invalid preface

Backport-of: 0544a732a44309bf7cbb44846dd9320c6096de17

! src/java.net.http/share/classes/jdk/internal/net/http/Stream.java
! test/jdk/java/net/httpclient/http2/server/Http2TestServerConnection.java