func: static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void)
  
  {
  
      gnutls_anon_server_credentials anon_cred;
  
      int ret;
  
  
  
      if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) {
  
  	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
  
  	return NULL;
  
      }
  
  
  
      gnutls_anon_set_server_dh_params(anon_cred, dh_params);
  
  
  
      return anon_cred;
  
  }
  