[RUN-3961] Add SessionValidationTimeout to the list of Runtime Custom settings

content/en/docs/refguide/runtime/custom-settings/_index.md

@@ -72,6 +72,7 @@ The following custom settings can be configured:
 | <a id="ScheduledEventExecution" href="#ScheduledEventExecution">ScheduledEventExecution</a> | Specify which scheduled events should be executed. Choices are `ALL`, `NONE`, or `SPECIFIED`. In the case of `SPECIFIED`, enumerate the scheduled events using the `MyScheduledEvents` configuration option described below. {{% alert color="warning" %}}This setting cannot be configured when running locally. To enable and disable scheduled events when running locally, please use the 'Enabled' setting on the [Scheduled Events execution properties](/refguide/scheduled-events/) in Studio Pro.{{% /alert %}} | NONE |
 | <a id="SessionKeepAliveUpdatesInterval" href="#SessionKeepAliveUpdatesInterval">SessionKeepAliveUpdatesInterval</a> | Defines how often a runtime writes session LastActive dates in its memory back to the database. | one sixth of the value configured for the `SessionTimeout` setting; if the `SessionTimeout` is not set, this value defaults to 100000 (100 seconds) |
 | <a id="SessionTimeout" href="#SessionTimeout">SessionTimeout</a> | Defines after how much time a session becomes invalid (in milliseconds). After that timeout,  a session becomes eligible for removal. The session will not be destroyed until the next time a scheduled task runs to clean up the active sessions. <br> {{% alert color="warning" %}} Sessions can be removed immediately by a query to the runtime after the session becomes eligible for removal. Navigating between pages is not enough to trigger a query to the runtime. To force a query to the runtime, use a microflow. For example, create a microflow that shows the Home page, then configure your app's navigation to call this microflow rather than relying on the navigation to directly show the page itself. This will ensure the runtime is queried and the user session is removed. {{% /alert %}} | 600000 (10 minutes) |
+| <a id="SessionValidationTimeout" href="#SessionValidationTimeout">SessionValidationTimeout</a> | Defines the maximum caching time (in milliseconds) for sessions after a user has been logged out. This means that after signing out of a session, the session might still be accessible for the configured time on other nodes of the cluster, but only if that node has handled a previous request on that session just before the logout happened. Lowering it makes the cluster more secure, because the chance that the session is still accessible within the configured time window is smaller. However, this also requires more frequent roundtrips to the database (which impacts performance). Increasing the timeout has the opposite effect | 600000 (10 minutes) |
 | <a id="Headers" href="#Headers">Headers</a> | A JSON object containing custom headers as key/value pairs, and can be used to define a `Content-Security-Policy`. For example, `{ "Content-Security-Policy": "script-src 'nonce-{{ NONCE }}'" }`. | `{}` |
 | <a id="TaskQueueShutdownGracePeriod" href="#TaskQueueShutdownGracePeriod">TaskQueue.<wbr>ShutdownGracePeriod</a> | Time in ms to wait for task in a task queue to finish when shutting down. | 10000 (10 seconds) |
 | <a id="TempPath" href="#TempPath">TempPath</a> | The location of the temporary files. | [deployment folder]\data\tmp |