hg: loom/loom: Sync up channel updates from jdk/jdk to allow fibers park when closing channel

[alan.bateman at oracle.com]

Changeset: a4216f04c718
Author:    alanb
Date:      2019-04-25 14:10 +0100
URL:       http://hg.openjdk.java.net/loom/loom/rev/a4216f04c718

Sync up channel updates from jdk/jdk to allow fibers park when closing channel

! src/java.base/share/classes/java/nio/channels/spi/AbstractInterruptibleChannel.java
! src/java.base/share/classes/sun/nio/ch/DatagramChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/DatagramSocketAdaptor.java
+ src/java.base/share/classes/sun/nio/ch/DummySocketImpl.java
! src/java.base/share/classes/sun/nio/ch/SelChImpl.java
! src/java.base/share/classes/sun/nio/ch/ServerSocketAdaptor.java
! src/java.base/share/classes/sun/nio/ch/ServerSocketChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/SocketAdaptor.java
! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! src/java.base/unix/classes/sun/nio/ch/SinkChannelImpl.java
! src/java.base/unix/classes/sun/nio/ch/SourceChannelImpl.java