* Extend the redis session store to support redis cluster
* rename function newRedisClient to newRedisCmdable
* update docs about redis cluster as session store
* update autocomplete script with redis cluster options
* add check about conflict between option redis-use-sentinel and redis-use-cluster
* update change log
* Update docs/configuration/sessions.md
Co-Authored-By: Joel Speed <Joel.speed@hotmail.co.uk>
* Update pkg/sessions/redis/redis_store.go
Co-Authored-By: Joel Speed <Joel.speed@hotmail.co.uk>
* add the dropped option back
Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>