Include new classes and defines and move things around for a little bit
of consistency.
Also remove the now unused variables.
Signed-off-by: Gabriel Filion <lelutin@gmail.com>
The current code makes it mandatory to have a file /etc/apt/preferences
present. In the event that this file is empty or contains a space,
apt-get update cannot execute.
Add a case with the special value "false" that ensures the file does not
exist.
Signed-off-by: Gabriel Filion <lelutin@gmail.com>
add more detailed information for $custom_sources_list with an example
add information about $custom_preferences with an example
add information about $custom_key_dir
add information about the apt::preseeded_package resource
add information about the apt::upgrade_package resource