Log Message:
Update from version 4.38 to 4.40.

Upstream changes:

4.40 - Friday, January 2, 2009
    No code changes.
    * DOCUMENTATION: Clarify that users should use the mailing list
      for support, instead of e-mailing the maintainers directly.

4.39 - Monday, December 15, 2008
    No code changes.
    * INTERNAL: Expand the discussion of auto-flushing in the POD.
      (Ron Savage, Mark Stosberg)
    * INTERNAL: Re-organize the documentation a bit.