Thanks to:

   * Robert Sanders for the signing code and DNS fixes.

   * Jamie L. Penman-Smithson for the wrapping code, and the header order
     workaround.

   * Clayton Smith for fixing the trailing empty lines bug.

   * Mark Delany for the canonifier torture tests.

   * Lennert Buytenhek for the bodyref fixes and header list enhancements.

   * Mark Martinec for the headerlist folding-whitespace fix,
     Email::Address regex loop, policy relaxation, header regex fix, and many
     other bugfixes.

   * Ben Lentz for the malformed or missing policy fix.