redis-trib: initial implementation of addnode command.
Cluster: add comments in sub-sections of CLUSTER command.
Cluster: blank node address when flagging it as NOADDR.
redis-trib: skip noaddr and disconnected nodes while loading cluster info.
Cluster: added a missing return on CLUSTER SETSLOT.
Cluster: CLUSTER FORGET implemented.
redis-trib help.
Merge remote branch 'antirez/unstable' into unstable