Help with TLS timeout problems (aws#172)

- update submodules, gets aws-c-io with longer default TLS timeouts.
- Expose MqttConnection::SetReconnectTimeout(...)

Author: graebm

aws-common-runtime/aws-c-cal

@@ -139,6 +139,14 @@ namespace Aws
                  */
                 bool SetWebsocketProxyOptions(const Http::HttpClientConnectionProxyOptions &proxyOptions) noexcept;
 
+                /**
+                 * Customize time to wait between reconnect attempts.
+                 * The time will start at min and multiply by 2 until max is reached.
+                 * The time resets back to min after a successful connection.
+                 * This function should only be called before Connect().
+                 */
+                bool SetReconnectTimeout(uint64_t min_seconds, uint64_t max_seconds) noexcept;
+
                 /**
                  * Initiates the connection, OnConnectionCompleted will
                  * be invoked in an event-loop thread.

aws-common-runtime/aws-c-common

@@ -330,6 +330,12 @@ namespace Aws
                 return true;
             }
 
+            bool MqttConnection::SetReconnectTimeout(uint64_t min_seconds, uint64_t max_seconds) noexcept
+            {
+                return aws_mqtt_client_connection_set_reconnect_timeout(
+                           m_underlyingConnection, min_seconds, max_seconds) == 0;
+            }
+
             bool MqttConnection::Connect(
                 const char *clientId,
                 bool cleanSession,