[MaraDNS list] CNAME chaining

[wc-tmp at useunix.net]

We're running Deadwood 3.2.01 and I've got users complaining that they
cannot resolve www.spireon.com.

Indeed when I test this it sometimes works and sometimes doesn't. I've
tested against my ISPs resolver and Google's public resolvers (8.8.8.8)
and it works reliably everytime.

In ths case www.spireon.com is a CNAME to another CNAME. Here is the dig
output (also note, that I've tested with dig and nslookup, both have
problems when resolving this against Deadwood):

------------------------------------------------------------------------
 <<>> DiG 9.9.2-P2 <<>> @10.203.11.39 www.spireon.com.
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9954
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.spireon.com.		IN	A

;; ANSWER SECTION:
www.spireon.com.	60	IN	CNAME	global.spireon.com.
global.spireon.com.	60	IN	CNAME	marketing-elb-spireon1-290371133.us-east-1.elb.amazonaws.com.
marketing-elb-spireon1-290371133.us-east-1.elb.amazonaws.com. 60 IN A 23.23.215.69

;; Query time: 111 msec
;; SERVER: 10.203.11.39#53(10.203.11.39)
;; WHEN: Wed Jun  5 14:42:40 2013
;; MSG SIZE  rcvd: 141
------------------------------------------------------------------------

I've seen that many recommend against CNAME chaining, while bad practice
it doesn't appear to violate the RFC, so I think Dw should handle this.
Can anyone else test this resolution and see if they experience the same
problem?

Thanks in advance,
Wayne