Add older versions of AFL
Add older versions of AFL

The lists on opensource.org currently list only AFL-3.0, though OSI
approved earlier versions.

http://wayback.archive.org/web/*/http://opensource.org/licenses/AFL*
lists pages on opensource.org for AFL-1.0, AFL-1.1, AFL-2.0, and
AFL-2.1.

kemitchell/spdx-osi.json