Log Message:
Update from version 1.18nb1 to 1.19.1 (upstream version 1.1901).

Upstream changes:

1.1901  2008-11-01

- Test fixes only. The tests planned the wrong number of tests on
  32-bit platforms, causing failures.

1.19    2008-11-01

- The calculation of the maximum integer size was using
  $Config{intsize} when it should use $Config{ivsize}. Apparently on a
  64-bit platform intsize can be 4 when ivsize is 8. Based on a patch
  from Jan Dubois.