Add release notes for 1.6.2

Add notes for next release; azure was merged, nice to get that out, some
other bugfixes.

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

notes/coredns-1.6.2.md

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++++
+title = "CoreDNS-1.6.2 Release"
+description = "CoreDNS-1.6.2 Release Notes."
+tags = ["Release", "1.6.2", "Notes"]
+release = "1.6.2"
+date = 2019-08-13T14:35:47+01:00
+author = "coredns"
++++
+
+The CoreDNS team has released
+[CoreDNS-1.6.2](https://github.com/coredns/coredns/releases/tag/v1.6.2).
+
+This is a bug fix release, but it also features a new plugin called [*azure*](/plugins/azure).
+
+# Plugins
+
+* Add [*azure*](/plugins/azure) to facilitate serving records from Microsoft Azure.
+* Make the refresh frequency adjustable in the [*route53*](/plugins/route53) plugin.
+* Fix the handling of truncated responses in [*forward*](/plugins/forward).
+
+## Brought to You By
+
+Andrey Meshkov,
+Chris O'Haver,
+Darshan Chaudhary,
+ethan,
+Matt Kulka
+and
+Miek Gieben.
+
+## Noteworthy Changes
+
+* plugin/azure: Add plugin for Azure DNS (https://github.com/coredns/coredns/pull/2945)
+* plugin/forward: Fix handling truncated responses in forward (https://github.com/coredns/coredns/pull/3110)
+* plugin/kubernetes: Don't do a zone transfer for NS requests (https://github.com/coredns/coredns/pull/3098)
+* plugin/kubernetes: fix NXDOMAIN/NODATA fallthough case (https://github.com/coredns/coredns/pull/3118)
+* plugin/route53: make refresh frequency adjustable (https://github.com/coredns/coredns/pull/3083)
+* plugin/route53: Various updates (https://github.com/coredns/coredns/pull/3108)