[dns-operations] bind + client-subnet

[Paul Vixie]

Jared Mauch wrote:
> ...
> We've seen poor CDN performance as a result of them only being granular to a /24 scope, as well as folks using the 'wrong' dns servers and being sent to CDN nodes a few networks or continents away.

using dns for cdn path optimization is controversial. this "subnet"
extension might not ever become part of the dns standard. detailed
technical discussions of this should take place on the ietf dnsext
mailing list, not here.