Upgrade from 2.6.14 to 2.6.15.
Add support for lang/lua, disabled by default.
UPGRADE URGENCY: MODERATE, upgrade ASAP only if you experience issues related to
the expired keys collection algorithm, or if you use the
* [FIX] Improved expired keys collection algorithm. Even under heavy load keys
to be expired can't accumulate because of lack of CPU time.
* [FIX] Fixed Issue #1240, ZUNIONSTORE could lead to wrong result.
* [NEW] redis-benchmark improvements.
* [NEW] dict.c API wrong usage detection.
WARNING: redis-benchmark released with 2.6.15 features non backward compatible
change in the way the random arguments are specified, use the --help
option for more information.