Manually reload haproxy

In most cases, dockercloud/haproxy will configure itself automatically when the linked services change, you don't need to reload it manually. But for some reason, if you have to do so, here is how:

• docker exec <haproxy_id> /reload.sh, if you are on the node where dockercloud/haproxy deploys
• docker-cloud exec <haproxy_uuid> /reload.sh, if you use docker-cloud cli