Event socket bug fix and more docs (#6823)

* Add documentation to methods. Use is_resource for added type detection

* Allow connect to specify timeout in microseconds with default 30,000

* Update calling mechanism for event sockets

* Update project for new singleton event sockets

* remove unused variable

* catch errors on closing the socket

core/notifications/notification_edit.php

@@ -74,9 +74,9 @@ Mark J Crane <markjcrane@fusionpbx.com>
 			$web_server = $_SERVER['SERVER_SOFTWARE'];
 
 			// switch version
-			$fp = event_socket_create();
-			if ($fp) {
-				$switch_result = event_socket_request($fp, 'api version');
+			$esl = event_socket::create();
+			if ($esl->is_connected()) {
+				$switch_result = event_socket::api('version');
 			}
 			$switch_ver = trim($switch_result);