Give Bureaus their own client object subclass. It does nothing at the moment, but we need it to be a distinct type for access control purposes.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5600 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/PresentsSession.java

@@ -619,6 +619,7 @@ public class PresentsSession
     protected void sessionWillStart ()
     {
         // configure a specific access controller for the client object
+        log.info("Setting access controller to PresentsObjectAccess.CLIENT");
         _clobj.setAccessController(PresentsObjectAccess.CLIENT);
     }