review of mountIfNeeded contract

Signed-off-by: Ludovic Orban <lorban@bitronix.be>

jetty-core/jetty-util/src/main/java/org/eclipse/jetty/util/resource/Resource.java

@@ -86,12 +86,7 @@ public abstract class Resource
             return null;
         try
         {
-            if (scheme.equalsIgnoreCase("jar"))
-            {
-                return FileSystemPool.INSTANCE.mount(uri);
-            }
-            // TODO: review contract, should this be null, or an empty mount?
-            return null;
+            return FileSystemPool.INSTANCE.mount(uri);
         }
         catch (IOException ioe)
         {