hg: jdk/sandbox: unixdomainchannels: Linux does not return -1 when getting SO_PEERCRED from unconnected socket

[michael.x.mcmahon at oracle.com]

Changeset: 46551543005b
Author:    michaelm
Date:      2020-05-02 09:49 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/46551543005b

unixdomainchannels: Linux does not return -1 when getting SO_PEERCRED from unconnected socket

! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! src/jdk.net/linux/native/libextnet/LinuxSocketOptions.c
! test/jdk/java/nio/channels/unixdomain/SocketOptions.java