Added a new hudson.footerURL system property to tweak the link displayed at the bottom of the UI

core/src/main/java/hudson/Functions.java

@@ -2,7 +2,8 @@
  * The MIT License
  * 
  * Copyright (c) 2004-2010, Sun Microsystems, Inc., Kohsuke Kawaguchi,
- * Yahoo! Inc., Stephen Connolly, Tom Huybrechts, Alan Harder, Romain Seguy
+ * Yahoo! Inc., Stephen Connolly, Tom Huybrechts, Alan Harder, Manufacture
+ * Francaise des Pneumatiques Michelin, Romain Seguy
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -108,6 +109,7 @@ import java.util.logging.LogManager;
 import java.util.logging.LogRecord;
 import java.util.logging.SimpleFormatter;
 import java.util.regex.Pattern;
+import org.apache.commons.lang.StringUtils;
 
 /**
  * Utility functions used in views.
@@ -648,6 +650,20 @@ public class Functions {
         return buf.toString();
     }
 
+    /**
+     * Returns the link to be displayed in the footer of the UI.
+     */
+    public static String getFooterURL() {
+        if(footerURL == null) {
+            footerURL = System.getProperty("hudson.footerURL");
+            if(StringUtils.isBlank(footerURL)) {
+                footerURL = "http://jenkins-ci.org/";
+            }
+        }
+        return footerURL;
+    }
+    private static String footerURL = null;
+
     public static List<JobPropertyDescriptor> getJobPropertyDescriptors(Class<? extends Job> clazz) {
         return JobPropertyDescriptor.getPropertyDescriptors(clazz);
     }