fingerprint link on workspace/archive was always 404.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1719 71c3de6d-444a-0410-be80-ed276b4c234a

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

@@ -95,7 +95,7 @@ public abstract class DirectoryHolder extends Actionable {
 
 
         if(isFingerprint) {
-            rsp.forward(f.digest(),"/",req);
+            rsp.forward(Hudson.getInstance().getFingerprint(f.digest()),"/",req);
         } else {
             ContentInfo ci = f.act(new ContentInfo());