Add section to explain how to sign events such that we can redact message contents
Add section to explain how to sign events such that we can redact message contents

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