Clarified that users should be specified by their bare JIDs.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@8956 b35dd754-fafc-0310-a699-88a17e54d16e

src/plugins/broadcast/readme.html

@@ -74,7 +74,8 @@ be configured under Server/Server Manager/System Properties:
     by letting anyone send broadcast messages to groups.</li>
     <li><tt>plugin.broadcast.allowedUsers</tt> -- the comma-delimitted list of users allowed
     to broadcast messages to all connected users at once. When this property isn't set,
-    anyone is allowed to broadcast messages to all users.</li>
+    anyone is allowed to broadcast messages to all users. Users should be specified by their
+    bare JID (e.g. john@myserver.com)</li>
 </ul>
 
 <h2>Using the Plugin</h2>