src/main/java/org/codehaus/plexus/archiver/war/WarArchiver.java
public void addWebinf( File directoryName, String[] includes, String[] excludes )
        throws ArchiverException
    {
        addDirectory( directoryName, "WEB-INF/", includes, excludes );
    }
public void addWebinf( File directoryName, String[] includes, String[] excludes )
        throws ArchiverException
    {
        addDirectory( directoryName, "WEB-INF/", includes, excludes );
    }
files to add under WEB-INF;