Get a 0 status code when it should be a 200

[johnseekins]

Instrumentation of this tool reports metrics like:

        "metric": {
          "__name__": "http_requests_total",
          "instance": "statsd-proxy:80",
          "job": "statsd-proxy",
          "method": "POST",
          "path": "/count",
          "status_code": "0"
        },

When the actual status code should be 200. Need to determine why we're getting bad values.

[johnseekins]

This is likely some artifact of how httprouter and negroni interact. Perhaps moving routing frameworks would help solve this?