To resolve the occurrence of the below error, a dependency has been added to require the nginx user first be created, either by nginx package installation or explicitly with salt (when installing nginx from source).

```
----------
          ID: /var/www
    Function: file.directory
      Result: False
     Comment: User nginx is not available Group nginx is not available
     Started: 15:50:02.070799
    Duration: 0.531 ms
     Changes:
----------
```

* added comment for pillar example
 * removed override releasever variable use for CentOS

* removed override releasever variable use for CentOS

Needed to add repo management because opensuse doesn't have nginx
in default repo

this is needed on archlinux where the pid file is set by systemd
not the nginx.conf file.

In the pillar file you just add
  pid:

an value of 'None' and no pid entry in nginx.conf.
this now works with every None value set in the pillar file

chkconfig was attempting to remove /etc/init.d/nginx when it did not exist.