right now the query system only allows servers to specify one PV.
i made this choice because supporting multiple PVs on the same server would make the (Rust) implementation kind of annoying,
but it could still be possible.
it is possible to retrofit servers supporting multiple PVs by putting the rest in the query payload,
but that isn't ideal, and I would like to figure this out before going stable.
right now the query system only allows servers to specify one PV.
i made this choice because supporting multiple PVs on the same server would make the (Rust) implementation kind of annoying,
but it could still be possible.
it is possible to retrofit servers supporting multiple PVs by putting the rest in the query payload,
but that isn't ideal, and I would like to figure this out before going stable.