Log Message:
Updated to 2.12

Changes:
version 2.12: Fri Dec 21 12:18:51 CET 2012

    Fixes:

    - default for Mail::Header::new(Modify) is 'false', not 'true'
      rt.cpan.org#79985 [Thomas Sibley]

    - Mail::Address take username with rindex(), a bit better than
      index() but still poor.
      rt.cpan.org#82056 [Filipe Gonçalves]

    Improvements:

    - check for bad folding of header lines
      rt.cpan.org#79993 [Thomas Sibley]

    - add a note about better to avoid Mail::Address->name(),
      in response to a question by
      rt.cpan.org#81459 [Moritz Lenz]