Update README.md (#1938)

Signed-off-by: Matt Klein <mklein@lyft.com>

README.md

@@ -35,9 +35,11 @@ to find out more about the origin story and design philosophy of Envoy.
 * [envoy-maintainers](https://groups.google.com/forum/#!forum/envoy-maintainers): Use this list
   to reach all core Envoy maintainers.
 * [Twitter](https://twitter.com/EnvoyProxy/): Follow along on Twitter!
-* [Slack](https://envoyproxy.slack.com/): Slack, to get invited go here: http://envoyslack.cncf.io (NOTE: Response to user
-  questions is best effort on Slack. For a "guaranteed" response please email envoy-users@ per the
-  guidance in the following linked thread.).
+* [Slack](https://envoyproxy.slack.com/): Slack, to get invited go [here](http://envoyslack.cncf.io). 
+  We have the IRC/XMPP gateways enabled if you prefer either of those. Once an account is created,
+  connection instructions for IRC/XMPP can be found [here](https://envoyproxy.slack.com/account/gateways).
+  * NOTE: Response to user questions is best effort on Slack. For a "guaranteed" response please email 
+    envoy-users@ per the guidance in the following linked thread.
 
 Please see [this](https://groups.google.com/forum/#!topic/envoy-announce/l9zjYsnS3TY) email thread 
 for information on email list usage.