Add release notes for 1.6.5 (#3373)

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

notes/coredns-1.6.5.md

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+title = "CoreDNS-1.6.5 Release"
+description = "CoreDNS-1.6.5 Release Notes."
+tags = ["Release", "1.6.5", "Notes"]
+release = "1.6.5"
+date = 2019-10-13T10:00:00+00:00
+author = "coredns"
++++
+
+The CoreDNS team has released
+[CoreDNS-1.6.5](https://github.com/coredns/coredns/releases/tag/v1.6.5).
+
+A fairly small release that polishes various plugins and fixes a bunch of bugs.
+
+# Plugins
+
+* [*forward*](/plugins/forward) don't block on returning sockets; instead timeout and drop the
+  socket on the floor, this makes each go-routine guarantee to exit .
+* [*kubernetes*](/plugins/kubernetes) adds metrics to measure kubernetes control plane latency, see
+  documentation for details.
+* [*file*](/plugins/file) fixes a panic when comparing domains names
+
+## Brought to You By
+
+Erfan Besharat,
+Hauke Löffler,
+Ingo Gottwald,
+janluk,
+Miek Gieben,
+Uladzimir Trehubenka,
+Yong Tang,
+yuxiaobo96.
+
+## Noteworthy Changes
+
+* core: Make request.Request smaller (https://github.com/coredns/coredns/pull/3351)
+* plugin/cache: move goroutine closure to separate function to save memory (https://github.com/coredns/coredns/pull/3353)
+* plugin/clouddns: remove initialization from init (https://github.com/coredns/coredns/pull/3349)
+* plugin/erratic: doc and zone transfer (https://github.com/coredns/coredns/pull/3340)
+* plugin/file: fix panic in miekg/dns.CompareDomainName() (https://github.com/coredns/coredns/pull/3337)
+* plugin/forward: make Yield not block (https://github.com/coredns/coredns/pull/3336)
+* plugin/forward: Move map to array (https://github.com/coredns/coredns/pull/3339)
+* plugin/kubernetes: Measure and expose DNS programming latency from Kubernetes plugin. (https://github.com/coredns/coredns/pull/3171)
+* plugin/route53: remove amazon intialization from init (https://github.com/coredns/coredns/pull/3348)