fix NPE for defer_client_bind_addr=true
Merge pull request #80 from bdecoste/master

 fix NPE for defer_client_bind_addr=true
Setting down_prot of the protocol above TP$ProtocolAdapter to point to the transport rather than the adapter, to prevent nested links from adapters to adapters (https://issues.jboss.org/browse/JGRP-1632)
Merge branch 'master' of github.com:belaban/JGroups
Added support for unicast probe (https://issues.jboss.org/browse/JGRP-1568)
[JGRP-1633] Fix typo in McastReceiverTest help message
JGRP-1631 Fixed issue with build with maven as it was missing log4j2 dependency.
Merge pull request #81 from wburns/JGRP-1631

JGRP-1631 Fixed issue with build with maven as it was missing log4j2 dep...
Using Math.abs() to compute positive index of lock based on lock name (https://issues.jboss.org/browse/JGRP-1639)
- Added ability to cancel sending of messages to MPerf
- Sending STABILITY message reliably to prevent OOME due to message accumulation in NAKACK2 caused by loss of STABILITY message (https://issues.jboss.org/browse/JGRP-1638)
- Sending STABILITY message *unreliably* but clearing 'votes' beforehand (https://issues.jboss.org/browse/JGRP-1638)
Fixed incorrect passing up of RSVP messages in RSVP.up(MessageBatch): ordering between RSVP and regular messages was incorrect
Load balancing of inter site requests received by a site master: requests are forwarded to random members for processing (https://issues.jboss.org/browse/JGRP-1635)
JGRP-1491: When creating a view, the creator should be our own address