Linkerd 1.3.7 includes memory leak fixes, tons of improvements for Consul, and more!  This release features contributions from ThreeComma, [NCBI](https://github.com/ncbi), WePay, [Salesforce](https://github.com/salesforce), [Homeaway](https://github.com/homeaway), Prosoft, and [Buoyant](https://github.com/buoyantio).

* Add support for more types of client certificates in the ForwardClientCertFilter ([#1850](https://github.com/linkerd/linkerd/pull/1850)).
* Improve documentation on how to override the base Docker image ([#1867](https://github.com/linkerd/linkerd/pull/1867)).
* Improve the efficientcy of the dtab delegator UI ([#1862](https://github.com/linkerd/linkerd/pull/1862)).
* Add a command line flag for config file validation ([#1854](https://github.com/linkerd/linkerd/pull/1854)).
* Fix a bug where the wrong timezone was being used in access logs ([#1851](https://github.com/linkerd/linkerd/pull/1851)).
* Add the ability to explicitly disable TLS for specific clients ([#1856](https://github.com/linkerd/linkerd/pull/1856)).
* Consul:
  * Add support for TLS-encrypted communication with Consul ([#1842](https://github.com/linkerd/linkerd/pull/1842)).
  * Fix a connection leak to Consul ([#1877](https://github.com/linkerd/linkerd/pull/1877)).
  * Fix a bug where Linkerd would timeout requests to non-existent Consul datacenters ([#1863](https://github.com/linkerd/linkerd/pull/1877)).
* Remove many alarming but harmless error messages from Linkerd and Namerd logs ([#1871](https://github.com/linkerd/linkerd/pull/1871), [#1884](https://github.com/linkerd/linkerd/pull/1884), [#1875](https://github.com/linkerd/linkerd/pull/1875)).
* Fix ByteBuffer memory leaks in HTTP/2 ([#1879](https://github.com/linkerd/linkerd/pull/1879), [#1858](https://github.com/linkerd/linkerd/pull/1858)).

Signed-off-by: Alex Leong <alex@buoyant.io>