hg: jdk/sandbox: TLS 1.3, check alpn respond value

[xuelei.fan at oracle.com]

Changeset: a06a7dece503
Author:    xuelei
Date:      2018-05-16 21:18 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/a06a7dece503

TLS 1.3, check alpn respond value

! src/java.base/share/classes/sun/security/ssl/AlpnExtension.java