A new cert bundle and key have been obtained for
static.openstack.org with SubjectAltNames for most of its relevant
vhosts. Switch it into place and generalize the current HTTPS
configuration for security.openstack.org in preparation for adding
HTTPS support to the remaining vhosts in subsequent commits. Also
add sane snakeoil fallback behavior for undefined certificate/key
files.
Change-Id: I65b7dbc3b5ad8735c158a1ac0b41b848ad5d2077
954ece8642