Fix eval usage in tests to conform with eval semantics
Merge remote-tracking branch 'upstream/unstable' into unstable
Fixed typo in word avarege in result message of --intrinsic-latency analyzer
Small typo fixed
fix issue 1787
Merge pull request #1788 from zionwu/unstable

fix issue 1787
Merge pull request #1789 from yoav-steinberg/fix_eval_in_tests

Fix eval usage in tests to conform with eval semantics
Merge pull request #1780 from badboy/patch-8

Small typo fixed
Merge pull request #1772 from andygrunwald/typo-avarege-average

Fixed typo in word avarege in result message of --intrinsic-latency analyzer
Cluster: SET-CONFIG-EPOCH should update currentEpoch.

SET-CONFIG-EPOCH, used by redis-trib at cluster creation time, failed to
update the currentEpoch, making it possible after a failover for a
server to set its configEpoch to a value smaller than the current one
(since configEpochs are obtained using currentEpoch).

The bug totally break the Redis Cluster algorithms and protocols
allowing for permanent split brain conditions about the slots
configuration as shown in issue #1799.
Cluster: check that configEpoch never goes back.

Since there are ways to alter the configEpoch outside of the failover
procedure (for exampel CLUSTER SET-CONFIG-EPOCH and via the configEpoch
collision resolution algorithm), make always sure, before replacing our
configEpoch with a new one, that it is greater than the current one.
ROLE command added.

The new ROLE command is designed in order to provide a client with
informations about the replication in a fast and easy to use way
compared to the INFO command where the same information is also
available.
ROLE output improved for slaves.

Info about the replication state with the master added.
Merge pull request #1 from antirez/unstable

update