New Deadwood snapshot: NS referral format revised

I have slightly revised the format of a NS referral in the second Deadwood snapshot for today. In the revised NS referral, we start off the string describing the NS referral with a single DNS label (DNS name) describing where in the DNS space the referral string points to (whether this packet should point to NS servers for all of the .com records, the google.com NS servers or what not).

Besides this, the format of a NS referral is identical.