redirect after posting IP address note so they cannot repost with F5

mod.php

@@ -2110,8 +2110,9 @@
 				markup($_POST['note']);
 				$query->bindValue(':body', $_POST['note']);
 				$query->execute() or error(db_error($query));
-			}
 				
+				header('Location: ?/IP/' . $ip, true, $config['redirect_http']);
+			} else {
 				$body = '';
 				$boards = listBoards();
 				foreach($boards as &$_board) {
@@ -2287,6 +2288,7 @@
 					'mod'=>true
 					)
 				);
+			}
 		} else {
 			error($config['error']['404']);
 		}