hg: jdk/sandbox: Enable RSASSA-PSS for TLS 1.2, and socket close checking

[xuelei.fan at oracle.com]

Changeset: 2b4ae319412b
Author:    xuelei
Date:      2018-06-12 22:15 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/2b4ae319412b

Enable RSASSA-PSS for TLS 1.2, and socket close checking

! src/java.base/share/classes/sun/security/ssl/SSLEngineImpl.java
! src/java.base/share/classes/sun/security/ssl/SSLSocketImpl.java
! src/java.base/share/classes/sun/security/ssl/SignatureScheme.java
! src/java.base/share/classes/sun/security/ssl/TransportContext.java
! test/jdk/sun/security/ssl/AppOutputStream/NoExceptionOnClose.java