Remove hack to avoid mrouted on 9.0.

Whatever the issue was, I seem to have avoided it through a combo of updating
all the 9.0 stuff and reverting to an older mrouted port.

clientside/tmcc/common/config/rc.mkelab

@@ -2068,14 +2068,6 @@ sub SetupBossNode($)
 	}
     }
 
-    #
-    # XXX ugh, right now mrouted seems to crash FBSD9
-    #
-    if ($FBSD_VERSION > 8 && $emulabconfig{"CONFIG_MROUTED"}) {
-	print "WARNING: disabling mrouted due to potential kernel crashes\n";
-	$emulabconfig{"CONFIG_MROUTED"} = 0;
-    }
-
     #
     # Need to create an /etc/rc.conf that is more suitable for boss.
     # I took most of this from our real boss node. It will be modified