hg: jdk/sandbox: Simplify close

[alan.bateman at oracle.com]

Changeset: 8b621b0d921c
Author:    alanb
Date:      2019-04-30 19:34 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/8b621b0d921c

Simplify close

! src/java.base/share/classes/java/net/ServerSocket.java
! src/java.base/share/classes/java/net/Socket.java
! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! test/jdk/com/sun/net/httpserver/Test1.java