dig md - Feature? Bug? What's going on?

[Tony Finch]

Matthew Horsfall (alh) <wolfsage at gmail.com> wrote:
> On Mon, Jul 27, 2015 at 12:19 PM, Matthew Horsfall (alh) <wolfsage at gmail.com> wrote:
> > Attempting to 'dig' for 'md' does something really weird. What am I missing?
>
> Ah, md is an obsolete RRTYPE. Nevermind! (Just like typing "dig a".)

Indeed. But why does it query for NS?

;; QUESTION SECTION:
;.                              IN      NS

Tony.
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