feat(router): listen on port 80 for platform SSL

With this change, applications can both listen on port 80 and port 443
when platform SSL is enabled. Applications can use the guide at
https://help.openshift.com/hc/en-us/articles/202398810-How-to-redirect-traffic-to-HTTPS-
to redirect applications to their respective protocol.

Author: Matthew Fisher

router/image/templates/deis.conf

@@ -2,6 +2,7 @@ server_name_in_redirect off;
 port_in_redirect off;
 
 {{ if .deis_router_sslCert }}
+listen 80;
 listen 443 ssl spdy;
 ssl_certificate /etc/ssl/deis.cert;
 ssl_certificate_key /etc/ssl/deis.key;