Feature request:
At the moment, in order to migrate a slot from one node to another, the redis-trib.rb script is needed or it involves multiple operations on different nodes:

• CLUSTER SETSLOT slot IMPORTING on target
• CLUSTER SETSLOT slot MIGRATING on source
• For each key in (CLUSTER GETKEYSINSLOT slot count):
  • MIGRATE target_host target_port key target_database id timeout
• CLUSTER SETSLOT slot NODE node-id on all nodes

However this set of operations could be wrapped in a "native" command:

CLUSTER MIGRATE slot target-node

As far as I can see, once this command is integrated, the CLUSTER SETSLOT slot [NODE|MIGRATING|IMPORTING] command would not be needed anymore.