ssh_packet_set_log_preamble
ssh_packet_set_log_preamble(ssh, "%suser %s",
ssh_packet_set_log_preamble(ssh, "user %s", authctxt->user);
ssh_packet_set_log_preamble(ssh, "user %s", authctxt->user);
ssh_packet_set_log_preamble(ssh, "%suser %s",
int ssh_packet_set_log_preamble(struct ssh *, const char *, ...)