<p>Configuration directives are the first nodes that are
processed by the __ConfigurationLoader class.<br/>
It contains information regarding how Lion should parse the
rest of the configuration file.</p>
<p>Configuration directives are allowed just in the main
configuration file (the config.xml file located in the root
directory)<br/>
It doesn't mean that if you use configuration directives
in an included files it will result in an error. It will
just be ignored.
</p>