Cluster: keys slot computation now supports hash tags.
Cluster: keys slot computation now supports hash tags.

Currently this is marginally useful, only to make sure two keys are in
the same hash slot when the cluster is stable (no rehashing in
progress).

In the future it is possible that support will be added to run
mutli-keys operations with keys in the same hash slot.

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