move extension-specific events into their extensions

ext/setup/main.php

@@ -1,5 +1,18 @@
 <?php
 
+/* ConfigSaveEvent {{{
+ *
+ * Sent when the setup screen's 'set' button has been
+ * activated; new config options are in $_POST
+ */
+class ConfigSaveEvent extends Event {
+	var $config;
+
+	public function ConfigSaveEvent($config) {
+		$this->config = $config;
+	}
+}
+// }}}
 /* SetupBuildingEvent {{{
  *
  * Sent when the setup page is ready to be added to