client: show "wrong URL - reattach" message as a notice

client/cs_scheduler.cpp

@@ -605,8 +605,8 @@ int CLIENT_STATE::handle_scheduler_reply(
                     sr.master_url
                 );
             } else {
-                msg_printf(project, MSG_INFO,
-                    _("You used the wrong URL for this project.  When convenient, remove this project, then add %s"),
+                msg_printf(project, MSG_USER_ALERT,
+                    _("This project is using an old URL.  When convenient, remove the project, then add %s"),
                     sr.master_url
                 );
             }