doc improvement

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@14769 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Queue.java

@@ -750,7 +750,14 @@ public class Queue extends ResourceController implements Saveable {
         boolean hasAbortPermission();
         
         /**
-         * The relative url for this task
+         * Returns the URL of this task relative to the context root of the application.
+         *
+         * <p>
+         * When the user clicks an item in the queue, this is the page where the user is taken to.
+         * Hudson expects the current instance to be bound to the URL returned by this method.
+         *
+         * @return
+         *      URL that ends with '/'.
          */
         String getUrl();