CNAME in Zones

[jafri]

Currently, bns only returns CNAME from a Zone as an authoritative server if the CNAME record is requested directly. If a server is authoritative for a certain name, I believe it should respond with the CNAME record to queries for all record types.

[pinheadmz]

@jafri hey, it's been over a year since you opened this issue sorry about that.

I just ran in to the same problem using bns, check out #20 would appreciate your review if it works for you.

[pinheadmz]

update: #22