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.
Merge branch 'master' into gsa

Conflicts:
	config/nginx/site.conf.erb
	gatekeeper