This fixes the following error when Jinja tries to process
`mpm_prefork.conf.jinja` or `00-mpm.conf.jinja`, when it processes the
`max_request_workers` comparison:

```
Unable to manage file: Jinja error: '>=' not supported between instances of 'str' and 'int'
[...]
<IfModule mpm_prefork_module>
  StartServers {{ mpm_param['start_servers'] | d('5') }}
  MaxRequestWorkers {{ mpm_param['max_request_workers'] | d('150') }}
{%- if mpm_param['max_request_workers'] | d('150') >= 256 %}    <======================
  ServerLimit {{ mpm_param['max_request_workers'] | d('150') }}
{%- endif %}
  MinSpareServers {{ mpm_param['min_spare_servers'] | d('5') }}
  MaxSpareServers {{ mpm_param['max_spare_servers'] | d('10') }}
  MaxConnectionsPerChild {{ mpm_param['max_connections_per_child'] | d('0') }}
```

Add filters that convert the values to an int first.

```bash
Examining apache/files/Debian/apache-2.2.config.jinja of type state
[201] Trailing whitespace
apache/files/Debian/apache-2.2.config.jinja:119
    MaxSpareThreads      75

[201] Trailing whitespace
apache/files/Debian/apache-2.2.config.jinja:136
    MaxSpareThreads      75
```

Document Stapling options in pillar.example

The formula currently adds a Listen directive for the port '*' if
any configured vhost is configured to listen on :* which does not
work and instead prevents apache from starting.

It is possible to prevent this by setting the
exclude_listen_directive pillar to True but this is a manual
workaround.

Instead, this commit excludes :* Listeners automatically.

* [ssl] [debian] manage ssl.conf with pillars
* [apache] make cyphersuite a list
* [apache/ssl] switch back to strings, lists merge is not good

If MaxRequestWorkers is greater than 256 than you also need to set the
ServerLimit value which is defaulted to 256 but has a 20000 hard maximum

* Adding exclude_listen_directive option

* Updating Debian config

Add gitignore, kitchen-ci files
Add some tests and documentation

Sometimes it's necessary optimization in nginx+apache2 environment

Added example shows 503 code instead of "It works!" page.

- Added more modules and configuration options
 - Renamed sls files to reflect what they do.
 - added mpm options for Debian