I would definitely recommend this -- it's been on
the agenda for.... well
literally for *years*, but always got swallowed up by time spent on other
things.
It should be pretty straightforward actually to aim a few of those
standalone wikis straight at the existing
secure.wikimedia.org proxy --
which appears to currently have a *.wikimedia.org wildcard cert -- or at
another dedicated one, and swap both the non-SSL URLs and the old-fashioned
secure.wikimedia.org entries for them to redirect to the canonical domain
with HTTPS.
Thus we could simply use
https://internal.wikimedia.org/ etc.
This could be done with much less worry about configuration changes and load
issues than doing the same for the higher-profile, higher-traffic sites on
their own domains, but can help build familiarity and confidence for both
ops and users.
-- brion