hg: jdk/jdk: 8233307: MulticastSocket getOption(IP_MULTICAST_IF) returns interface when not set

[daniel.fuchs at oracle.com]

Changeset: 6f12009ea9d7
Author:    pconcannon
Date:      2019-11-28 16:49 +0000
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/6f12009ea9d7

8233307: MulticastSocket getOption(IP_MULTICAST_IF) returns interface when not set
Summary: The MulticastSocket method getOption has been changed to conform to the behavior described in StandardSocketOptions.IP_MULTICAST_IF.
Reviewed-by: chegar, dfuchs

! src/java.base/share/classes/java/net/MulticastSocket.java
! src/java.base/unix/native/libnet/PlainDatagramSocketImpl.c
! src/java.base/windows/native/libnet/TwoStacksPlainDatagramSocketImpl.c
+ test/jdk/java/net/NetworkInterface/NoSetNetworkInterface.java