Perform full reset of all client connection states, is if the client was
disconnected and re-connected. This affects:
* MULTI state
* Watched keys
* MONITOR mode
* Pub/Sub subscription
* ACL/Authenticated state
* Client tracking state
* Cluster read-only/asking state
* RESP version (reset to 2)
* Selected database
* CLIENT REPLY state
The response is +RESET to make it easily distinguishable from other
responses.
Co-authored-by: Oran Agra <oran@redislabs.com>
Co-authored-by: Itamar Haber <itamar@redislabs.com>
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