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General observations
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License
=======

The code is licensed under the terms of the GPL version 2 upgrading to GPL 3
would require consent from all former contributors. Copyright years of files
have not been consistently incremented/updated on changes.

Languages
=========

The code base is a mix of Perl, Shell and PHP code. Most of the code is
implemented in PHP.

Code structure
==============

Comments and inline documentation
=================================

The code base is not documented in a good way, there are neither class nor
method or function comments. Comments are just used for the license header
in most of the files.