func: void vnc_sasl_client_cleanup(VncState *vs)
  
  {
  
      if (vs->sasl.conn) {
  
          vs->sasl.runSSF = vs->sasl.waitWriteSSF = vs->sasl.wantSSF = 0;
  
          vs->sasl.encodedLength = vs->sasl.encodedOffset = 0;
  
          vs->sasl.encoded = NULL;
  
          g_free(vs->sasl.username);
  
          free(vs->sasl.mechlist);
  
          vs->sasl.username = vs->sasl.mechlist = NULL;
  
          sasl_dispose(&vs->sasl.conn);
  
          vs->sasl.conn = NULL;
  
      }
  
  }
  