kafka-1529; transient unit test failure in testAutoCreateAfterDeleteTopic; patched by Jun Rao; reviewed by Guozhang Wang and Neha Narkhede
kafka-1531; zookeeper.connection.timeout.ms is set to 10000000 in configuration file in Kafka tarball; patched by Manikumar Reddy; reviewed by Jun Rao
KAFKA-1512 Add per-ip connection limits.
KAFKA-1414 Speedup broker shutdown and startup after hard reset; patched by Jay Kreps,  Alexey Ozeritskiy, Dmitry Bugaychenko and Anton Karamanov