Update from 6.0.4 to 6.0.5.

<ChangeLog>

Upgrade urgency MODERATE: several bugs with moderate impact are fixed here.

The most important issues are listed here:

• Fix handling of speical chars in ACL LOAD.
• Make Redis Cluster more robust about operation errors that may lead to two clusters to mix together.
• Revert the sendfile() implementation of RDB transfer. It causes some delay.
• Fix TLS certificate loading for chained certificates.
• Fix AOF rewirting of KEEPTTL SET option.
• Fix MULTI/EXEC behavior during -BUSY script errors.

</ChangeLog>