Add resolve-hostnames support for Sentinel
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Starting with version 6.2, Sentinel has optional support for host names. This capability is disabled by default. If you're going to enable DNS/hostnames support, please note: 1. The name resolution configuration on your Redis and Sentinel nodes must be reliable and be able to resolve addresses quickly. Unexpected delays in address resolution may have a negative impact on Sentinel. 2. You should use hostnames everywhere and avoid mixing hostnames and IP addresses. To do that, use replica-announce-ip <hostname> and sentinel announce-ip <hostname> for all Redis and Sentinel instances, respectively. Cf. https://redis.io/docs/latest/operate/oss_and_stack/management/sentinel/#ip-addresses-and-dns-names
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This Pull request add support for the Sentinel option:
resolve_hostnames.