cygport: 'announce' feature branch

[Yaakov Selkowitz]

I just created a new 'announce' feature branch in cygport git:

https://github.com/cygwinports/cygport/tree/announce

The new 'announce' command generates an announcement template from
the .cygport file based on NAME/VERSION/RELEASE, PKG_NAMES, and
DESCRIPTION, to which you can easily add release-specific information,
and then sends the message via an SMTP server.  Note that this adds
dependencies on perl-Authen-SASL, perl-MIME-tools, and
perl-Net-SMTP-SSL, and requires several new SMTP_* configuration options
in cygport.conf.

Feedback and patches welcome.

--
Yaakov