[MaraDNS] Deadwood update: Deadwood now works with RFC2535 packets

A decade and a half after RFC2535 came out, dig is finally starting to
generate packets using the extra bits in the header defined there. I
have updated Deadwood (MaraDNS' recursive resolver) to be able to
handle those packets.

For users using a newer version of dig, get the latest snapshot of Deadwood:

https://github.com/samboy/MaraDNS

I plan on releasing a new version of MaraDNS and Deadwood in early
2015 with these fixes applied (as well as the zoneserver in Cygwin
fixes)

- Sam