LS-18: Fix PHP-nginx Integration

### Testing
1. Point kitchen yaml at git@github.com:mike-spainhower/php-web-services.git `change-mysqli-timeout` branch
1. Converge
1. Browse to `http://dev-services.hexxie.com` and see that index now returns something
1. Browse to `http://dev-services.hexxie.com/dashboard.php` and see that it now returns something

### Changes
* Increase fastcgi proxying timeout
* Log more of the things
* Remove 4XX and 5XX response docs that do not exist
* Serve actually existent index file