follow setpoint: monitoring message improved

z_server/devices/__init__.py

                 tm_t, value_t = self.__target_storage__[self.FOLLOW_KEY]
             except KeyError:
                 if value_s is not None:
-                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.OK, "Current temperature setpoint %.1f°C (age=%.1fmin), but never received a setpoint. That might be okay." % (value_s, (time.time()-tm_s)/60))
+                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.OK, "Current temperature setpoint %.1f°C, but never received a setpoint. That might be okay." % value_s)
                 return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.UNKNOWN, "Device exists, but no data received")
             else:
                 tm = time.time()
                 dt = tm - tm_t
                 if value_t != value_s and dt > self.FOLLOW_REQUEST_ERROR:
-                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.ERROR, "Requested setpoint unequal valve setpoint %.1f°C since %.1fmin" % (value_s, (time.time()-tm_s)/60))
+                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.ERROR, "Requested setpoint %.1f°C unequal valve setpoint %.1f°C since %.1fmin" % (value_t, value_s, (time.time()-tm_s)/60))
                 elif value_t != value_s and dt > self.FOLLOW_REQUEST_WARNING:
-                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.WARNING, "Requested setpoint unequal valve setpoint %.1f°C since %.1fmin" % (value_s, (time.time()-tm_s)))
+                    return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.WARNING, "Requested setpoint %.1f°C unequal valve setpoint %.1f°C since %.1fmin" % (value_t, value_s, (time.time()-tm_s)))
                 return self.__nagios_return__(self.MONITORING_FOLLOW_SETPOINT, nagios.Nagios.OK, "Requested setpoint equal valve setpoint %.1f°C" % value_s)
         #
         # BATTERY