1.6.8 release notes: set date to today (#3771)
1.6.8 release notes: set date to today (#3771)

We should really release. I'm setting the date to today, and kick off a
release after this is merged.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>
coredns/coredns,johnbelamaric/coredns,miekg/coredns,chrisohaver/coredns,yongtang/coredns,johnbelamaric/coredns,miekg/coredns