Bump gatekeeper to fix rate limiting bug.
Bump gatekeeper.
Bump gatekeeper with temporary dns workarounds.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper
Bump gatekeeper.
Bump gatekeeper.
Bump gatekeeper.
Ensure HTTPS requests don't buffer the response.

Proxy buffering was being left on via the SSL terminator proxy. But in
this case, we don't really need the SSL terminator proxy anymore, so
let's simplify by combining that into the main server listener (so 80
and 443 are both handled the same way).
Bump gatekeeper.
More tweaks for running everything through supervsior:

- Pull in all the config from the gatekeeper.
- Experiment with using Puma for serving the Rails app (for exploring
  phased restarts as well as making it more feasible to switch to
  JRuby and threading later on).
- Add buffering to nginx logging (should theoretically reduce disk IO).
- Improve supervisord logging setup.
Merge remote-tracking branch 'origin/master' into config