Other changes:
* Restyle port to use options framework plus other style changes.
* Remove MD5 authentication knob - enabled by default now.
* Add X-Originating-IP knob with patch from upstream.
* Add ssmtp.conf.5 man page to installation.
PR: 154924
Submitted by: Aragon Gouveia <aragon@phat.za.net> (maintainer)
