RFR: 8233296: MulticastSocket getOption/setOption inverts the value of IP_MULTICAST_LOOP

[Daniel Fuchs]

Hi,

Please find below a fix for:

8233296: MulticastSocket getOption/setOption inverts the value
          of IP_MULTICAST_LOOP
https://bugs.openjdk.java.net/browse/JDK-8233296

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8233296/webrev.00/

I am not sure whether a CSR was strictly needed but since
this is a very confusing issue I'd prefer to have the behavioral
changes properly documented, so I filed a CSR.
The fine points are documented there.

CSR:
https://bugs.openjdk.java.net/browse/JDK-8234582

best regards,

-- daniel