RFE: license metatdata

[ben@…]

If DP intends to distribute binary packages, we'll run into some complex license issues, e.g.:

​http://www.gnome.org/~markmc/openssl-and-the-gpl.html

If we're to keep track of these, it will be necessary to include a field for license type in the Portfile. Fink's example:

​http://fink.sourceforge.net/doc/packaging/policy.php?phpLang=en#licenses

I expect there are many license issues in individual ports -- e.g. doubt that all GPL ports install the COPYING flie as required.