public void outputMetadata(String[] names) {
            for (String name : names) {
                for (String value : metadata.getValues(name)) {
                    writer.println(name + ": " + value);
                }
            }
        }
Compares our mime types registry with the File(1) tool's
directory of (uncompiled) Magic entries.
(Well, those with mimetypes anyway)

@param magicDir Path to the magic directory
tika-app/src/main/java/org/apache/tika/cli/TikaCLI.java