Patch in: fed1a401607ed31781d0668be540ecc3e9356f78

    commit fed1a401607ed31781d0668be540ecc3e9356f78
    Author: Megh Bhatt <meghb@juniper.net>
    Date:   Sun Dec 22 22:41:56 2013 -0800

        Pass in shared_ptr for redisBoostClient in boost async_read_some
        so that the redisBoostClient object does not get deleted when
        the callback is still pending.