removed "Anonymous" from user role list

lib/python/AccessControl/addUser.dtml

@@ -61,8 +61,10 @@ and roles for the new user and click "Add".
   <SELECT NAME="roles:list" SIZE="5" MULTIPLE>
   <!--#in valid_roles-->
   <!--#if expr="_vars['sequence-item'] != 'Anonymous'"-->
+  <!--#if expr="_vars['sequence-item'] != 'Shared'"-->
   <OPTION VALUE="<!--#var sequence-item-->"><!--#var sequence-item-->
   <!--#/if-->
+  <!--#/if-->
   <!--#/in valid_roles-->
   </SELECT>
   <BR>

lib/python/AccessControl/editUser.dtml

@@ -55,12 +55,14 @@
 <SELECT NAME="roles:list" SIZE="5" MULTIPLE>
 <!--#in valid_roles-->
 <!--#if expr="_vars['sequence-item'] != 'Anonymous'"-->
+<!--#if expr="_vars['sequence-item'] != 'Shared'"-->
 <!--#if expr="_vars['sequence-item'] in user.roles"-->
 <OPTION VALUE="<!--#var sequence-item-->" SELECTED><!--#var sequence-item-->
 <!--#else-->
 <OPTION VALUE="<!--#var sequence-item-->"><!--#var sequence-item-->
 <!--#/if-->
 <!--#/if-->
+<!--#/if-->
 <!--#/in valid_roles-->
 </SELECT>
 <INPUT TYPE="HIDDEN" NAME="name" VALUE="<!--#var expr="user.name"-->">