Update to 2.16
    
    - New upstream release 2.16
      - Mail::Header continues reading after wrongly folded line (CPAN RT#113464)
      - Mail::Mailer::open call of exec() explained
      - Fix example in Mail::Address
      - Fix Mail::Header file parsing regression in 2.15 (CPAN RT#113874)
    - Simplify find command using -delete