Add a sample /etc/sysconfig/httpd file for the dispatcher

[paul-bjorkstrand]

While it is good that the documentation references the need to put server-specific configurations into the /etc/sysconfig/httpd file, there is no sample provided with all configurable variables.

It would be great if such a file existed, that contained all configurable vars (docroots, hostnames, etc) that could be used to easily create a dispatcher in a local environment, without trawling through every file looking for ${ ... } and extracting the names.

[gabrielwalt]

Great idea, it would be amazing is someone would be ready to step forward with a pull request!