469860 - Add module metadata versioning to support backwards compat

+ Tweaking defaults/ini section naming per discussion yesterday.

jetty-start/src/main/java/org/eclipse/jetty/start/Module.java

@@ -308,7 +308,8 @@ public class Module extends Node<Module>
                             case "FILES":
                                 files.add(line);
                                 break;
-                            case "DEFAULTS":
+                            case "DEFAULTS": // old name from 9.2.x
+                            case "INI": // new name for 9.3+
                                 defaultConfig.add(line);
                                 hasDefaultConfig = true;
                                 break;

jetty-start/src/test/resources/usecases/versioned-modules/modules/new.mod

@@ -5,6 +5,6 @@
 [version]
 9.3
 
-[defaults]
+[ini]
 the-future=is-new