Updates to fallback CAS login to do new token login
Updates to fallback CAS login to do new token login

matrix-org/synapse,iot-factory/synapse,TribeMedia/synapse,TribeMedia/synapse,TribeMedia/synapse,matrix-org/synapse,matrix-org/synapse,iot-factory/synapse,matrix-org/synapse,iot-factory/synapse,iot-factory/synapse,matrix-org/synapse,TribeMedia/synapse,matrix-org/synapse,TribeMedia/synapse,iot-factory/synapse