Feature request: allow extra options for storage backends

[maxxiefjv]

I would like to allow some way of supporting a TLS connection, specifying the certificates. This is a draft PR meant for discussion

Edit:

As it is about a RedisWrapper this solution is probably better:

    def __init__(self, db_uri, collection, ttl=None, options={}):
        if not _has_redis:
            raise ImportError("redis module is required but it is not available")
        self._db = Redis.from_url(db_uri, decode_responses=True)
        self._db = Redis.from_url(db_uri, decode_responses=True, **options)
        ...

[c00kiemon5ter]

I think this looks ok

[maxxiefjv]

@c00kiemon5ter I updated the code to your request. I agree that its best to handle this situation as most defaults appear to be None

[c00kiemon5ter]

Note: set all but the first arg to RedisWrapper to be keyword-only args.

Added db_name as the redis db index.

[c00kiemon5ter]

Now, the MongoWrapper and RedisWrapper initialization interfaces are the same.

[c00kiemon5ter]

db_name is now valid for redis.