Add 1.7.0 notes already (#3779)
Add 1.7.0 notes already (#3779)

* Add 1.7.0 notes already

This is the work-in-progress release notes for 1.7.0, adding it now so
we can craft it will we work towards 1.7.0.

Notes currently yell that 1.7.0 is backwards incompatible.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

* Update notes/coredns-1.7.0.md

Co-Authored-By: Ben Kochie <9bbf917dc63fbaa40c67921332d26cf16a50db75@gmail.com>

Co-authored-by: Ben Kochie <9bbf917dc63fbaa40c67921332d26cf16a50db75@gmail.com>
yongtang/coredns,coredns/coredns,miekg/coredns,johnbelamaric/coredns,johnbelamaric/coredns,miekg/coredns,chrisohaver/coredns