Add support for custom configuration options outside the virtualhost section

At the moment the aem-dispatcher role does not offer any possibility to define custom options outside the

section. This would allow us to configure settings which are not allowed inside the VirtualHost Section like ListenPort etc.

When implementing this in the templates this would affect

• https://github.com/wcm-io-devops/conga-aem-definitions/blob/develop/conga-aem-definitions/src/main/templates/aem-dispatcher/author/vhost_author.conf.hbs

• https://github.com/wcm-io-devops/conga-aem-definitions/blob/develop/conga-aem-definitions/src/main/templates/aem-dispatcher/author/vhost_author.ssl.conf.hbs

• https://github.com/wcm-io-devops/conga-aem-definitions/blob/develop/conga-aem-definitions/src/main/templates/aem-dispatcher/publish/vhost_publish_tenant.conf.hbs

• https://github.com/wcm-io-devops/conga-aem-definitions/blob/develop/conga-aem-definitions/src/main/templates/aem-dispatcher/publish/vhost_publish_tenant.ssl.conf.hbs

The problem is, that this may conflict with the already available/implemented configuration option

Another option would be to render a new configuration file like "dispatcher.conf" and name it for example "custom.conf" and place the configuration there.