JBS: https://bugs.openjdk.java.net/browse/JDK-8213202 webrev: http://cr.openjdk.java.net/~apetcher/8213202/webrev.00/
This change fixes a bug that allows multiple clients thread to offer the same PSK to the server, even though only one thread may actually use the PSK to resume the session. The other threads will fail to connect and throw an exception. This is noreg-hard because the bug doesn't happen with the JDK TLS server, and we don't have a regression test harness that allows us to simulate some particular server behavior. I tested the fix by connecting multiple JDK clients to an openssl server.
