Update from version 4.61nb1 to 4.63.

Pkgsrc changes:
o Adjust dependencies, including reshuffling to match contents
  and order in META.yml
o Require perl version 5.8, also according to META.yml

Upstream changes:

4.63 Sat Jan  3 12:46:15 EST 2009
    [DOCUMENTATION]
    - Improve docs for writing your own constraints (girlwithglasses)

4.62 Sat Jan  3 12:10:14 EST 2009

    [DOCUMENTATION]
    - Fix typo in ConstraintsFactory docs (Geraint A. Edwards)
    - Clarified docs for get_filtered_data (Lisa Hagemann)
    - Clarify that 'field_filter_regexp_map' can take coderefs as
      values (Ron Savage)

    [INTERNALS]
    - Better diagnostics when load_profiles fails (Thoralf Klein)
    - Improved portability of t/untaint.t (Alexandr Ciornii)
    - Make some tests conditional on Date::Calc being installed (Frank Wiles)

(he)