BIND started replying to queries for .com with .COM

[Phil Mayers]

On 30/03/2016 12:25, Mark Andrews wrote:

> The recent change was to record and return the learnt case of
> ownernames (to the RRset level) rather than use whatever was used
> to build the red-black tree names.

What is considered the source of the ownername for, say, "com."? One 
thing I saw when I was trying to understand this was the results of the 
following queries to a cold-cache bind process:

dig @localhost www.microsoft.CoM
dig @localhost www.google.com
dig @localhost www.google.com

I was surprised that #2 and #3 auth/add sections contain the .CoM label 
presumably built from #1, and also that #2 and #3 answer sections differ.

None of this is a problem, but I am curious and I couldn't figure it out 
from the code!