Provide a newbie-friendly message about adding users at the top of the

quickstart page if the root acl_users contains no users.  Required an
additional default user folder method, hasUsers.

lib/python/AccessControl/User.py

@@ -12,7 +12,7 @@
 ##############################################################################
 """Access control package"""
 
-__version__='$Revision: 1.178 $'[11:-2]
+__version__='$Revision: 1.179 $'[11:-2]
 
 import Globals, socket, SpecialUsers,re
 import os
@@ -1026,6 +1026,14 @@ class UserFolder(BasicUserFolder):
         """Return the named user object or None"""
         return self.data.get(name, None)
 
+    def hasUsers(self):
+        """ This is not a formal API method: it is used only to provide
+        a way for the quickstart page to determine if the default user
+        folder contains any users to provide instructions on how to
+        add a user for newbies.  Using getUserNames or getUsers would have
+        posed a denial of service risk."""
+        return not not len(self.data)
+
     def _doAddUser(self, name, password, roles, domains, **kw):
         """Create a new user"""
         if password is not None and self.encrypt_passwords:

lib/python/App/dtml/zope_quick_start.dtml

@@ -24,6 +24,27 @@
            form_title='Zope Quick Start',
 	   )">
 
+<dtml-if expr="not PARENTS[0].acl_users.hasUsers()">
+<div class="system-msg">
+<h3>
+You have not created any users in this Zope instance.  In order to
+log in and manage this Zope instance, you'll need to add an adminstrative
+user account.
+</h3>
+<p>
+If you're running Zope on UNIX or Linux, you can create an administrative
+user account via the "zopectl adduser" command from a shell.  If you're
+running Zope on Windows, you'll need to use the "zpasswd.py" utility in your
+Zope installation's "bin" directory
+at <i><dtml-var "Control_Panel.getZOPE_HOME()">\bin</i>
+to create a file named <i>inituser</i> in your Zope instance home at
+<i><dtml-var "Control_Panel.getINSTANCE_HOME()"></i> that contains the
+initial administrative username and password.
+</p>
+</div>
+</dtml-if>
+
+
 <p>
 Welcome to <strong>Zope</strong>, a high-performance object-oriented 
 platform for building dynamic Web applications. Here are some quick