Description:
------------
Negative timestamps seem to work with the date function but not the strtotime function.  This occurs on all of the Gentoo Linux boxes I am running on both kernel version 2.4.23 and 2.4.28.  I am running PHP 4.3.10 and Apache/2.0.52.


Reproduce code:
---------------
<?php
  echo date("m/d/Y H:i:s", -2145888000)."\n";
  //01/01/1902 00:00:00

  echo strtotime("Jan 1 1902")."\n";
  //-1

  echo date("m/d/Y H:i:s", -631123200)."\n";
  //01/01/1950 00:00:00

  echo strtotime("Jan 1 1950")."\n";
  //-1

  echo date("m/d/Y H:i:s", 946713600)."\n";
  //01/01/2000 00:00:00

  echo strtotime("Jan 1 2000")."\n";
  //946713600
?>

Expected result:
----------------
01/01/1902 00:00:00
-2145888000
01/01/1950 00:00:00
-631123200
01/01/2000 00:00:00
946713600


Actual result:
--------------
01/01/1902 00:00:00
-1
01/01/1950 00:00:00
-1
01/01/2000 00:00:00
946713600