please include function stefansChat_onLine.

// n = max number of lines to get (from most recent)
static L<S> stefansChat_readHistory(int n) {
  int b = stefansChat_onLine_firstRead;
  if (b < 0) b = stefansChat_n();
  int a = max(0, b-n);
  L<Map> msgs = (L) safeUnstruct(loadPage("http://botcompany.de/1008998/raw/msgs-from-to?a=" + a + "&b=" + b));
  ret collect(msgs, 'text);
}