Allow per-dc enabling of hints
patch by Sankalp Kohli; reviewed by Lyuben Todorov for CASSANDRA-6157
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Allow repairing between specific replicas
patch by Sankalp Kohli; reviewed by Lyuben Todorov for CASSANDRA-6440
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk