Log Message:
p5-Mail-Sendmail: update to 0.80.

0.80 2017-08-20 NEILB
    - NEILB got co-maint to do a release that includes META.yml and META.json.
    - Switched to Dist::Zilla.
    - Added COPYRIGHT section to pod.
    - Fixed the NAME section in pod to follow expected format.
    - Added "use warnings" and fixed all the warnings.
    - Manually set $VERSION, as it's used in the code

0.79_16 2006-07-08 MIVKOVIC
    - experimental SMTP AUTH support (LOGIN PLAIN CRAM-MD5 DIGEST-MD5)
    - Fix bug where one refused RCPT TO: would abort everything
    - send EHLO, and parse response (for later AUTH implementation)
    - better handling of multi-line responses, and better error-messages
    - Also normalize line endings in headers
    - Now keeps the Sender header if it was used. Previous versions
      only used it for the MAIL FROM: command and deleted it.
    - No space between "MAIL FROM:" or "RCPT TO:" and address.