hg: jdk9/sandbox/jdk: http-client-branch: Added a PrefaceController to Http2Connection and improved logs when sending preface.

[daniel.fuchs at oracle.com]

Changeset: 77ea0652beb0
Author:    dfuchs
Date:      2016-09-02 21:16 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/77ea0652beb0

http-client-branch: Added a PrefaceController to Http2Connection and improved logs when sending preface.

! src/java.httpclient/share/classes/java/net/http/Http2Connection.java