anchor.diff:  [[upgrade2.0.replication]]
   .Special upgrading for Replication users from pre-HBase 1.4
   
  -User running versions of HBase prior to the 1.4.0 release that make use of replication should be sure to read the instructions in the section [[upgrade1.4.replication]].
  +User running versions of HBase prior to the 1.4.0 release that make use of replication should be sure to read the instructions in the section <<upgrade1.4.replication>>.
   
   [[upgrade2.0.jruby]]
   .HBase shell now based on JRuby 9.1.10.0
  
positive.code: 
  [[upgrade2.0.dependencies]]
  .Significant changes to runtime classpath
  A number of internal dependencies for HBase were updated or removed from the runtime classpath. Downstream client users who do not follow the guidance in [[upgrade2.0.shaded.client.preferred]] will have to examine the set of dependencies Maven pulls in for impact. Downstream users of LimitedPrivate Coprocessor APIs will need to examine the runtime environment for impact. For details on our new handling of third party libraries that have historically been a problem with respect to harmonizing compatible runtime versions, see the reference guide section [[thirdparty]].
  
  [[upgrade2.0.public.api]]
  .Multiple breaking changes to source and binary compatibility for client API
  
negative.code: 
  The following configuration settings are no longer applicable or available. For details, please see the detailed release notes.
  
  * hbase.config.read.zookeeper.config (see <<upgrade2.0.zkconfig>> for migration details)
  * hbase.zookeeper.useMulti (HBase now always uses ZK's multi functionality)
  * hbase.rpc.client.threads.max
  * hbase.rpc.client.nativetransport
  