/td>
    <td valign="top">The number of milliseconds leeway to give before
    deciding a file is out of date. This is needed because not every
    file system supports tracking the last modified time to the
    millisecond level. Default is 0 milliseconds, or 2 seconds on DOS
    systems.  This can also be useful if source and target files live
    on separate machines with clocks being out of sync.  <em>since Ant
    1.6</em>.</td>
  </tr>
  <tr>
    <td valign="top">performGCOnFailedDelete</td>
    <td v