Fix wrong repldboff type which causes dropped replication in rare cases.
redis-cli: fix big keys search when the key no longer exist.

The code freed a reply object that was never created, resulting in a
segfault every time randomkey returned a key that was deleted before we
queried it for size.
Allow AUTH / PING when disconnected from slave and serve-stale-data is no.
redis-benchmark: update help for new __rand_int__ form.
Deprecate utils/redis-copy.rb in favor of redis-copy gem
Merge pull request #1366 from yaauie/deprecate-redis-copy-script-in-2.6

2.6 branch backport of #1365
Fix broken rdbWriteRaw() return value check in rdb.c.

Thanks to @PhoneLi for reporting.
Log to what master a slave is going to connect to.
Only run the fast active expire cycle if master & enabled.
Merge pull request #847 from yossigo/repldboff-fix

Fix wrong repldboff type which causes dropped replication in rare cases.
Redis 2.6.17.
Merge commit '2.6.17' into 2.6-ipv6