hg: jdk/sandbox: unixdomainchannels: new test plus apidoc update

[michael.x.mcmahon at oracle.com]

Changeset: 4e648a2d8480
Author:    michaelm
Date:      2019-11-14 12:38 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4e648a2d8480

unixdomainchannels: new test plus apidoc update

! src/java.base/share/classes/java/nio/channels/ServerSocketChannel.java
! src/java.base/share/classes/java/nio/channels/SocketChannel.java
+ test/jdk/java/nio/channels/unixdomain/Bind.java