I looked at this and saw that not even the latest bind version allows - at the
beginning. If anybody allows it this is likely a side effect of not using the
bind code base. I see no reason to diverge here.
Plus, this could have unwanted effects. If somebody makes a mistake when
specifying a host name a parameter might be mistaken for it. This might even be
exploitable.
I looked at this and saw that not even the latest bind version allows - at the
beginning. If anybody allows it this is likely a side effect of not using the
bind code base. I see no reason to diverge here.
Plus, this could have unwanted effects. If somebody makes a mistake when
specifying a host name a parameter might be mistaken for it. This might even be
exploitable.
So, no, this won't change.