Update from 2.6.8 to 2.6.9.
UPGRADE URGENCY: MODERATE if you use replication.
* [BUGFIX] Changing master at runtime (SLAVEOF command) in presence of
network problems, or in very rapid succession, could result
in non-critical problems (GitHub Issue #828).
* [IMPROVED] CLINGET GETNAME and SETNAME to set and query connection names
reported by CLIENT LIST. Very useful for debugging of
* [IMPROVED] redis-cli is now able to transfer an RDB file from a remote
server to a local file using the --rdb <filename> command