heroku/rack-timeout — pull request #50 by ankane (2014-09-11 06:27:00+00:00)
Title: Added support for nginx proxy_set_header X-Request-Start $msec and t=${msec}

Thanks for the awesome gem! This commit makes it easier to configure `X-Request-Start` for Nginx. It adds support for the following configurations:

```conf
proxy_set_header X-Request-Start $msec;
```

or

```conf
proxy_set_header X-Request-Start "t=${msec}";
```