This is the result of a public process to get explicit agreements from
all the contributors to the blog that started in November 2023 and is
now complete:

  https://lists.gnu.org/archive/html/guix-science/2023-11/msg00004.html

See the ‘BLOG-LICENSING.org’ file to a track record.

* haunt.scm (post->sxml): Add license footer.
* static/css/main.css (.license): New rule.
* BLOG-LICENSING.org: Add intro.