HUDSON-6260 provide helpful information about the 'authenticated' group when...

HUDSON-6260 provide helpful information about the 'authenticated' group when adding a user/group to a matrix

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30088 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/security/GlobalMatrixAuthorizationStrategy/help-user-group.html

@@ -5,4 +5,8 @@
   entered here as "ROLE_DEVS".  The prefix and case settings may be adjusted by
   editing the <tt>WEB-INF/security/LDAPBindSecurityRealm.groovy</tt> file in your
   Hudson deployment and restarting Hudson.
+
+  <p>
+  A special group "authenticated" is also available, which represents all
+  authenticated (logged in) users.
 </div>