Update REDIS_CLUSTER_IPLEN to INET6_ADDRSTRLEN.
Update REDIS_CLUSTER_IPLEN to INET6_ADDRSTRLEN.

Change REDIS_CLUSTER_IPLEN to INET6_ADDRSTRLEN so that the clusterNode
ip character buffer is big enough to hold an IPv6 address.

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis