old haproxy conf; one of many variations used to get socket.io and ngnix playing well together

gistfile1.txt

global
    maxconn 4096
    pidfile /var/run/haproxy.pid
    debug

defaults
    mode http

frontend all
    bind 0.0.0.0:80

    maxconn 4096
    timeout client 1h
    default_backend www_backend

    # Any URL beginning with socket.io will be flagged as 'is_websocket'
    acl is_websocket path_beg /socket.io
    acl is_websocket hdr(Upgrade) -i WebSocket
    acl is_websocket hdr_beg(Host) -i ws

    # The connection to use if 'is_websocket' is flagged
    use_backend socket_backend_http if is_websocket    
    #log 127.0.0.1:514 local0

backend www_backend
    option httplog
    option httpclose
    balance roundrobin
    option forwardfor
    timeout server 30000
    timeout connect 4000
    server thin1 localhost:8000 weight 1 maxconn 1024 check
    #server thin2 localhost:4002 weight 1 maxconn 1024 check
    #server thin3 localhost:4003 weight 1 maxconn 1024 check

backend socket_backend_http
    mode   http
    option httplog
    #option http-server-close
    option forceclose
    no option httpclose
    balance roundrobin
    option forwardfor
    timeout queue 5000
    timeout server 86400000
    timeout connect 86400000
    timeout check 1s
    server socket1 localhost:8001 weight 1 maxconn 1024 check