Update Digest-SHA to CPAN version 5.63

Update Digest-SHA to CPAN version 5.63

  [DELTA]

  5.63  Tue Nov  8 02:36:42 MST 2011
  - added code to allow very large data inputs all at once
    -- previously limited to several hundred MB at a time
    -- many thanks to Thomas Drugeon for his elegant patch
  - removed outdated reference URLs from several test scripts
    -- these URLs aren't essential, and often go stale
    -- thanks to Leon Brocard for spotting this
      -- ref. rt.cpan.org #68740