Add suggestion about variable naming reflecting underlying config option

[juniorsysadmin]

Add a note about preferring that variables be exactly the same as the name of the configuration of the application.

eg. If a configuration file supports
maximum_graphics=true
then preferably the associated parameter should also be called $maximum_graphics not $max_graphics or $max_gfx

(Unless the configuration item is a Puppet reserved word)

[bastelfreak]

@juniorsysadmin I like the idea. Would you like to propose a PR?
https://github.com/voxpupuli/voxpupuli.github.io/blob/master/docs/index.md#reviewing-a-module-pr