Added a link to the official URL reference.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@3433 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/scm/browsers/ViewCVS.java

@@ -16,6 +16,7 @@ import java.net.URL;
  * {@link RepositoryBrowser} for CVS.
  * @author Kohsuke Kawaguchi
  */
+// See http://viewvc.tigris.org/source/browse/*checkout*/viewvc/trunk/docs/url-reference.html
 public final class ViewCVS extends CVSRepositoryBrowser {
     /**
      * The URL of the top of the site.

core/src/main/java/hudson/scm/browsers/ViewSVN.java

@@ -19,6 +19,7 @@ import java.net.URL;
  * @author Kohsuke Kawaguchi
  * @since 1.90
  */
+// See http://viewvc.tigris.org/source/browse/*checkout*/viewvc/trunk/docs/url-reference.html
 public class ViewSVN extends SubversionRepositoryBrowser {
     /**
      * The URL of the top of the site.