Help with environment variables in config

[jdtommy]

here is my simple `listen` section of the haproxy config file:

    listen graph_front
       bind *:8182
       mode tcp
       server graph_server graph.server.com:8182

this works just fine, but I need the address and port to be a environment
variable. So I changed it to this:

    listen graph_front
       bind *:8182
       mode tcp
       server graph_server "$GRAPH_ADDRESS":"$GRAPH_PORT"

the haproxy server restarts just fine, but it no longer forwards to the
address in the environment variables.

any ideas?