static S html_linkURLs(S html) {
  L<S> tok = htmlTok(html);
  /* for (int i = 0; i < l(tok); i += 2)
    tok.set(i, tok.get(i).replaceAll("\\(?\\b(http://|www[.])[-A-Za-z0-9+&amp;@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&amp;@#/%=~_()|]", "<a href="\\"$1\\">$1</a>")); */
  ret join(tok);
}