Update docs for exit-app ECP command

docs/DEVELOPER/dev-tools/external-control-api.md

@@ -147,7 +147,7 @@ The external control services provided by ECP are included in a simple RESTful A
       </div></td><td class="long-line">Developer mode enabled<br /><br /><strong>Control by mobile apps</strong> setting "Enabled"</td></tr>
     <tr><td class="long-line">query/app-object-counts/&lt;<em>channelId</em>&gt;<br /><br /><em>Available since <a href="https://developer.roku.com/dev/docs/release-notes#roku-os-130">Roku OS 13.0</a></em></td><td class="long-line">Returns the counts for the different BrightScript node objects in the app. This helps developers determine the counts of each type of object held by their Brightscript app.<br /><br />The app may either be a sideloaded app or an app from the Streaming Store. To output the results for an app in the app store, the device must be keyed with the same developer ID/key that was used to generate the package file.</td><td class="long-line">Developer mode enabled<br /><br /><strong>Control by mobile apps</strong> setting "Enabled"</td></tr>
     <tr><td class="long-line">query/app-state/&lt;<em>appId</em>&gt;<br /><br /><em>Available since <a href="https://developer.roku.com/dev/docs/release-notes#roku-os-130">Roku OS 13.0</a></em></td><td class="long-line">Returns the current app state: "active", "background" (suspended; running in the background), or "inactive". <br /><br />The app may either be a sideloaded app or an app from the Streaming Store. To output the results for an app in the app store, the device must be keyed with the same developer ID/key that was used to generate the package file.<br /><br />If the app is not installed, this command returns an error.</td><td class="long-line">Developer mode enabled<br /><br /><strong>Control by mobile apps</strong> setting "Enabled"</td></tr>
-    <tr><td class="long-line">exit-app<br /><br />(POST request)<br /><br /><em>Available since <a href="https://developer.roku.com/dev/docs/release-notes#roku-os-130">Roku OS 13.0</a></em></td><td class="long-line">Suspends or terminates an app that is running: <br /><ul><li>If the app supports Instant Resume and is running in the foreground, sending this command suspends the app (the app runs in the background).</li><li>If the app supports Instant Resume and is running in the background or the app does not support Instant Resume and is running, sending this command terminates the app.</li></ul></td><td class="long-line">Developer mode enabled<br /><br /><strong>Control by mobile apps</strong> setting "Enabled"</td></tr>
+    <tr><td class="long-line">exit-app/&lt;<em>channelId</em>&gt;[/true]<br /><br />(POST request)<br /><br /><em>Available since <a href="https://developer.roku.com/dev/docs/release-notes#roku-os-130">Roku OS 13.0</a></em></td><td class="long-line">Suspends or terminates an app that is running: <br /><ul><li>If the app does not support Instant Resume and is running, sending this command terminates the app.</li><li>If the app supports Instant Resume and is running, sending this command suspends the app (the app runs in the background).</li><li>If the app supports Instant Resume and is running, sending this command with the optional <code>/true</code> parameter terminates the app (the app does not run in the background).</li></ul></td><td class="long-line">Developer mode enabled<br /><br /><strong>Control by mobile apps</strong> setting "Enabled"</td></tr>
     <tr><td class="short-line">input</td><td class="long-line">Sends custom events to the current application. It takes a user defined list of name-value pairs sent as query string URI parameters. The external control server places these name-value pairs into an associative array, and passes them directly through to the currently executing app script using a Message Port attached to a created roInput object.<br /><br />[Input Command Conventions](doc:external-control-api#input-command-conventions) includes detailed recommendations on how to pass your data.<br /><br />Messages of type [roInputEvent](doc:roinputevent) have a GetInfo() method that will obtain the associative array. The arguments must be URL-encoded. <br /><br />This command is sent using an HTTP POST with no body. Example: <code>POST /input?acceleration.x=0.0&acceleration.y=0.0&acceleration.z=9.8</code></td><td class="short-line" /></tr>
   </tbody>
 </table>
@@ -619,10 +619,10 @@ The response includes the following fields:
 
 #### exit-app example
 
-The following command suspends or terminates an app that is running.
+The following command suspends or terminates an app that is running. The optional `/true` parameter will force the termination of the app even if it supports instant-resume. Without this, an instant-resume channel will remain running in the background.
 
 ```bash
-$ curl -d '' "http://$ROKU_DEV_TARGET:8060/exit-app/<channelId>"
+$ curl -d '' "http://$ROKU_DEV_TARGET:8060/exit-app/<channelId>[/true]"
 ```
 
 This command returns an HTTP 200 success code if the app was active or suspended. It returns an HTTP 404 (Not Found) error if the app was not running.