 "global"
 <code>LogFactory</code>'s factories member! If <code>LogFactory.release()</code>
 is called whenever component is unloaded, the classloaders will be correctly
 garbage collected; this <i>should</i> be done by any container that
 bundles commons-logging by default. However, holding the classloader
 references weakly ensures that the classloader will be garbage collected
 without the container performing this step.
 <p>
 <strong>Limitations:</strong>
 There is still one (unusual) scenario in which 