bug#20973: Package: adns

[Patrik Ragnarsson]

Looks like adns does not recognize certain hostnames as valid. Example:

Works with dig:

> $ dig +short -t txt mx._domainkey.twingly.com
> "k=rsa\; 
> p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDauFgv2L1AS+ZvdeHC4NaItVgJ4JEc9UFlGKFKBl3wxIk5THKEa2T3WlQM6lJFMK0pqS5Cs63lELqZzJTGmgUEmpY17/HHFzEPM3682Wc2mzfZsYlsWTXbk77rHKt7Ndox/X
> 2Vq8EYv4r432glm4laaXcTv4P3XFcZv/OwDVCFDQIDAQAB"

Does not with adns:

> $ adnshost -t txt mx._domainkey.twingly.com
> Error during DNS TXT lookup for mx._domainkey.twingly.com: Domain name is 
> syntactically invalid

Same type of query, but another hostname, works:

> $ adnshost -t txt twingly.com
> twingly.com TXT "v=spf1 ip4:80.252.185.200 ip4:80.252.171.64/27 
> include:_spf.google.com include:mailgun.org include:spf.mandrillapp.com 
> include:in.deliverhq.com ~all"
> twingly.com TXT 
> "google-site-verification=eKph1PVX-uNAeg6W_Qj_zM75HXz-fV9T-09yuTp7Nqw"

Using:

> $ adnshost --version
> adnshost (GNU adns) 1.5.0
>
> Copyright (C) 1997-2000,2003,2006,2014  Ian Jackson
> Copyright (C) 2014  Mark Wooding
> Copyright (C) 1999-2000,2003,2006  Tony Finch
> Copyright (C) 1991 Massachusetts Institute of Technology
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

> $ dig -v
> DiG 9.9.5