Restarting app shouldn't drop requests

[lazyatom]

I think unicorn can do application restarts without losing a single request, but I suspect that foreman is shutting it down completely and restarting it. This might be a quick fix for the issue where printers print out 503 errors after a deployment.

[lazyatom]

Another quick fix might be setting the retry parameter of Apache's ProxyPass directive to 0 -- see http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

[lazyatom]

I've added retry=0 to the apache config, because I can't find a simple way of getting upstart (and therefore foreman) to restart a process by sending a different signal.