nt; <b>f_ext</b> now in absolute
    coordinates</td>
</tr>
<tr>
  <td><b>HandC</b></td>
  <td>no gravity argument; <b>f_ext</b> now in absolute coordinates</td>
</tr>
<tr>
  <td><b>HD</b></td>
  <td>no gravity argument; <b>f_ext</b> now in absolute coordinates</td>
</tr>
<tr>
  <td><b>ID</b></td>
  <td>no gravity argument; <b>f_ext</b> now in absolute coordinates</td>
</tr>
<tr>
  <td><b>IDf</b></td>
  <td>name changed to <b>IDfb</b>; return value <b>afb</b> replaced
    with <b>xdfb</b>; arguments <b>Xfb<