fix IO::Async abuse - thanks leo
fix IO::Async abuse - thanks leo

howethomas/synapse,matrix-org/synapse,howethomas/synapse,matrix-org/synapse,iot-factory/synapse,howethomas/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,howethomas/synapse,illicitonion/synapse,TribeMedia/synapse,TribeMedia/synapse,iot-factory/synapse,rzr/synapse,rzr/synapse,illicitonion/synapse,iot-factory/synapse,rzr/synapse,matrix-org/synapse,rzr/synapse,TribeMedia/synapse,iot-factory/synapse,TribeMedia/synapse,illicitonion/synapse,howethomas/synapse,iot-factory/synapse,illicitonion/synapse,illicitonion/synapse,rzr/synapse,TribeMedia/synapse