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make sure that the augeas class has been applied before attempting to do any
augeas operations. without this, you will non-deterministically get:

    err: /Stage[main]/Shorewall::Base/Augeas[shorewall_module_config_path]: Could not evaluate: Save failed with return code false

final results in /etc/shorewall/puppet, we have to make sure the shorewall.conf
is pointing to that directory to get those configurations. This commit fixes that.

shorewall.conf, because if they do not exist, you will get a puppet error.

this commit removes them, and updates the README to provide instructions for how
you can do it the old way, if you want

operatingsystem package install its default config (this lets us stop having to
keep this file updated), and instead tell people to configure their
shorewall.conf file using the augeas method.

It is possible still to distribute a shorewall.conf from a site-shorewall
directory, however if the file is distributed, then it is not possible to use
the augeas method.

https://labs.riseup.net/code/issues/2738

Added Ubuntu Support. That means installed package is now shorewall-shell instead of shorewall (which is dummy package for shorewall-shell anyway).

fix lookup problem of default config, copy CentOS to be default, copy lenny to be default for debian