Adds backchannel support to the disruptor

Change-Id: I36408416056e0d2621f6d603bb1a90067b9f17bb
Signed-off-by: Duarte Nunes <duarte@midokura.com>
Trade Options for nulls in ObjectPool

Change-Id: Ic848efef1897de501569c97eac8b3bfb391d8eb9
Signed-off-by: Duarte Nunes <duarte@midokura.com>