PHP
===
- `nginx_php`: boolean if you need to preconfigure PHP (default: false)
- `nginx_php_sockets`: list of sockets (see bellow)
You should see [Nginx upstream module doc](http://nginx.org/en/docs/http/ngx_http_upstream_module.html).
Each socket have:
- `unix_socket`
- `host`
- `port`
- `weight`
- `max_fails`
- `fail_timeout`
With default configuration, it works fine with PHP-FPM. But if you install PHP7 with Dotdeb, path changed between version, you must set well this list.
