Log Message:
Updated to version 0.17.

Pkgsrc changes:
  - The module is now available on CPAN, so changed MASTER_SITES accordingly.
  - Changed HOMEPAGE to CPAN site because Jason Long's web site seems to
    be down occasionally.
  - Added Crypt::OpenSSL::Bignum as a requirement (listed in Makefile.PL)
    because Mail::DKIM uses objects of that type (returned by
    Crypt::OpenSSL::RSA::get_key_parameters).
  - New requirement: security/p5-Digest-SHA

Relevant changes since version 0.14:
====================================

 * implemented signing and verifying of a SHA-256 digest
 * various new tests and a few bug fixes