The content under docs.o.o/releases is moving to releases.o.o instead,
so set up a redirect.
Depends-On: I547f1c3731e86353c3338035c65e5b887d9deee5
(changing the publishing instructions)
Depends-On: I41221d84e6c985bcc55f9b2a6f15210d2410bc84
(establishing the new vhost)
Change-Id: I8435bb6ea7250cf41c803278784d3ccedf487834