Upgrade from 5.0.2 to 5.0.3.

<ChangeLog>

Upgrade urgency HIGH: Redis 5 is consolidating, upgrading is a good idea.

However there is nothing very critical here, but certain
issues resolved could lead to very rare crashes.

Welcome to Redis 5.0.3, several interesting bug fixes here:

• Redis no longer panics when you send data to a replica-mode connection that is in MONITOR or SYNC mode.

• Fixes to certain sorted set edge cases. You are unlikely to ever notice those issues, but now it is more correct.

• Certain BSD variants now are better supported: build & register logging on crash.

• The networking core now recovers if an IPv6 address is listed in bind but is actually not able to work because there is no such protocol in the system.

• redis-cli cluster mode improved in many ways. Especially the fix subcommand work was enhanced to cover other edge cases that were still not covered after the work done for Redis 5.

• MEMORY USAGE is now more accurate.

• DEBUG DIGEST-VALUE added in case you want to make sure a given set of keys (and not the whole DB) are excatly the same between two instances.

• Fix a potential crash in the networking code related to recent changes to the way the reply is consumed.

• Reject EXEC containing write commands against an instance that changed role from master to replica during our transaction.

• Fix a crash in KEYS and other commands using pattern matching, in an edge case where the pattern contains a zero byte.

• Fix eviction during AOF loading due to maxmemory triggered by commands executed in loading state.

</ChangeLog>