Add support for HAProxy map

[tersmitten]

• http://blog.haproxy.com/2015/01/26/web-application-name-to-backend-mapping-in-haproxy/
• https://www.tekovic.com/dynamic-haproxy-backends
• #36

[tersmitten]

And lists:

acl is_ported_path path_reg -i -f /etc/haproxy/ported_path.list

### cat /etc/haproxy/ported_path.list 
^/users/add_player$
^/users/view.*$

[tersmitten]

https://cbonte.github.io/haproxy-dconv/1.7/configuration.html#7