Client lib: display chunk and chunk server access tokens with chunk allocate rps show method to facilitate debugging. Write appender: set chunk server network protocol state machine authentication context to null, if no access tokens used, to turn off authentication negotiation with chunk server (only meta server supports negotiation).
Client lib: set chunk server kfs protocol state machine authentication context to 0 with no psk key, to turn off authentication negotiation, as chunk server doesn't support authentication negotiation.