Add #1735 related fixes/improvements to changelog

CHANGELOG.md

@@ -4,6 +4,7 @@ IMPROVEMENTS:
   * core: Introduce node SecretID which can be used to minimize the available
     surface area of RPCs to malicious Nomad Clients [GH-1597] 
   * cli: `nomad alloc-status` shows allocation creation time [GH-1623]
+  * client: Retry all servers on RPC call failure [GH-1735]
   * client: Enforce shared allocation directory disk usage [GH-1580]
   * client: Introduce a `secrets/` directory to tasks where sensitive data can
     be written [GH-1681]
@@ -17,6 +18,8 @@ BUG FIXES:
   * client/fingerprint: Fix inconsistent CPU MHz fingerprinting [GH-1366]
   * discovery: Fix old services not getting removed from consul on update
     [GH-1668]
+  * discovery: Fix client flapping when server was in a different datacenter
+    [GH-1641]
   * discovery: Fix HTTP timeout with Server HTTP health check when there is no
     leader [GH-1656]