config manager: run shutdown hook after plugins

runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java

@@ -910,7 +910,10 @@ public class ConfigManager
 		return object == null ? null : object.toString();
 	}
 
-	@Subscribe(priority = 100)
+	@Subscribe(
+		// run after plugins, in the event they save config on shutdown
+		priority = -100
+	)
 	private void onClientShutdown(ClientShutdown e)
 	{
 		Future<Void> f = sendConfig();

runelite-client/src/main/java/net/runelite/client/eventbus/Subscribe.java

@@ -38,5 +38,9 @@ import java.lang.annotation.Target;
 @Documented
 public @interface Subscribe
 {
+	/**
+	 * Priority relative to other event subscribers. Higher priorities run first.
+	 * @return
+	 */
 	float priority() default 0;
 }