The openstack.org pages now support https and our references to
the site should by default be one signed by the organization.
Change-Id: I8a0588259d7b3fc8bd10504ffba7129b840e2a0d
Replace URLs for workflow documentation to appropriate parts of the
OpenStack Project Infrastructure Manual.
Change-Id: I5b4f7bc5268132b129fc56c919af00d7f9600c9f