Since we're not planning to include the fs2 backend as part of the next release, but the custom `n_val` and `sloppy_quorum` stuff is part of the next riak release, how about extracting this into a separate PR that we can merge in for the next release? Either way it seems like we need to have a way to disable the `GetOptions1` options for users using versions of Riak that do not support these options.