The current Red Hat config allows to set DefaultCharset to a value.
In certain situations it is necessary to leave it unconfigured thouguh.
Make the content optional, if the value of apache.default_charset is None,
the item is skipped. Otherwise it defaults to UTF-8.
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.
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.
The docroot fix from PR#240 worked fine for default servers.
But as soon as one uses vhosts this broke as the vhosts were
created under the docroot in /var/www/html rather than the better
/var/www.
Fix this by differentiating between docroot and wwwdir.
Further allow to override both in Red Hat-style configs.
The override allows to reuse this formula for the softwarecollections
rpms.
* RedHat: Made AddDefaultCharset Directive configurable
* Added description of apache:lookup:default_charset to pillar.example, sane default equals former hardcoded UTF-8
