Added hard-coded packet response to allow testing of the decoding.

[Danack]

tbh I'm not entirely sure what the behaviour is meant to be but it looks like:

• asking for an IPV6 returns a CNAME.
• asking for a CNAME has an 'Undefined offset' error.

I capture the packet using the commented out function, so I hope it's correct - though it is possible I'm passing in garbage.

[Danack]

Closing this - submitting one with more changes that I did in a branch.