login/logout visibility is not controlled by servlet anymore.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@6329 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/lib/layout/layout.jelly

@@ -98,7 +98,7 @@
               <j:if test="${app.useSecurity}">
                 <st:nbsp/>
                 <j:choose>
-                  <j:when test="${request.userPrincipal!=null}">
+                  <j:when test="${!h.isAnonymous()}">
                     <a style="color:white" href="${rootURL}/logout"><b>logout</b></a>
                   </j:when>
                   <j:otherwise>