The description in protocols.md of the Redis protocol server in Scylla explains how its port can be configured, but not how the listening IP address can be configured. It turns out that the same "rpc_address" that controls CQL's and Thrift's IP address also applies to Redis. So let's document that. Signed-off-by: Nadav Har'El <nyh@scylladb.com> Message-Id: <20211208160206.1290916-1-nyh@scylladb.com>