Redirect mail.wikipedia.org to lists.wikimedia.org

Add a redirect for old mail.wikipedia.org URLs that point to list
archives to lists.wikimedia.org. This fixes a certificate mismatch for
HTTPS URLs, as the listserver does not have a wikipedia.org certificate.

Bug: 44731
RT:  6981
Change-Id: I5e6abc5fcb7ecc34764b0f559189c964b5df0de7