[Toybox] [patch] add new command "nslookup"

[Rich Felker]

On Tue, Sep 22, 2015 at 10:26:27AM +0900, Hyejin Kim wrote:
> Hi.
> 
> Added a new command "nslookup" for internal needs.
> 
> Have a look, plz.

FYI the method of poking at _res to change nameservers does not work
with musl and support for it won't be added -- it's an ugly stateful
mess relying on accidentally-exposed internal data structures.

I think Rob has something based on my version of host(1) in pending,
which shows how to query arbitrary servers and parse arbitrary records
(not just A/AAAA) in a clean manner with the public stateless APIs.
But what you have so far might be a good addition for the mean time
anyway until it can be improved.

Rich

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