Return owner if caller asks.

[adns] / regress / case-trunc.out

adns debug: using nameserver 172.18.45.6
trunc.test.iwj.relativity.greenend.org.uk type 1 A(-) submitted
trunc.test.iwj.relativity.greenend.org.uk type A(-): No such data; nrrs=0; cname=$; ttl=60