Allow upstreams to be specified without an explicit port in the URL.
Add very basic HTTPS/SSL support to the listener and service options.
Merge pull request #26 from pquerna/basic_ssl_support

Add very basic HTTPS/SSL support to the listener and service options.
Merge pull request #27 from pquerna/allow_usptreams_without_explicit_ports

Allow upstreams to be specified without an explicit port in the URL.