hg: jdk/sandbox: imported patch protfam.updates

[michael.x.mcmahon at oracle.com]

Changeset: 975360d1cf04
Author:    michaelm
Date:      2020-02-18 10:05 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/975360d1cf04

imported patch protfam.updates

! src/java.base/share/classes/sun/nio/ch/SelectorProviderImpl.java
! src/java.base/share/classes/sun/nio/ch/ServerSocketChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! test/jdk/java/nio/channels/ProtocolFamilies.java