Archiving of pgsql-announce

With the changes to pgsql-announce made a couple of months ago to have
it synced up with the news on www.postgresql.org, we are now
"archiving" news posts both on www.postgresql.org/about/newsarchive/
and on www.postgresql.org/list/pgsql-announce, with the second one
archiving it without the formatting.

I suggest that we stop the archiving of the list itself, and stick to
just the news archive. We can also update the list description to
explicitly say this with a link back of course.

(We will of course continue to *send* it to the list, I'm just talking
about the archives)

AFAICT the only actual lost functionality in this would be that you
can't get old news in mbox format.

Thoughts?

-- 
 Magnus Hagander
 Me: https://www.hagander.net/
 Work: https://www.redpill-linpro.com/