While the staff mailing list is hidden and private in production,
that configuration is set after creation, so in our deployment tests
we can absolutely verify that HTTP and HTTPS redirects for listinfo
and archives work anyway. This paves the way for any further
rewrites and associated testing we may need to do for other mailing
lists which move between domains, as well as testing redirects we
may set up as part of the v2 to v3 migration.
Change-Id: I68078554a72e3b59d8192ac4339e8654a8351f52
b84bdffc08