hg: jdk/submit: Testing IPV6_V6ONLY

[jianglizhou at google.com]

Changeset: db8b88586fa4
Author:    aeubanks
Date:      2019-04-16 13:16 -0700
URL:       http://hg.openjdk.java.net/jdk/submit/rev/db8b88586fa4

Testing IPV6_V6ONLY

! src/java.base/unix/native/libnet/PlainDatagramSocketImpl.c
! src/java.base/unix/native/libnet/PlainSocketImpl.c
! src/java.base/unix/native/libnio/ch/Net.c