Sam Saffron fb8d1f35a4 DEV: support USR2 to restart unicorn in dev mode
In dev mode sending USR2 to the unicorn master supervisor process will
restart unicorn.

This allows a simple script like this to restart unicorn in dev:

```
#!/usr/bin/env bash

kill -s USR2 `ps aux | grep ruby\ bin\/unicorn | grep -v grep | awk '{print $2}'`
```
2019-09-11 17:35:58 +10:00
..
2019-09-04 16:19:48 +10:00
2019-07-09 08:51:23 +01:00