public void setUseXmlFormat(boolean useXmlFormat) {
        this.useXmlFormat = useXmlFormat;
    }
Determines whether or not the properties XML format should be used.  For more information, see
{@link Properties#loadFromXML(java.io.InputStream)}

@param useXmlFormat true to use XML or false to use the normal format.  Defaults to false.
core/src/main/java/org/apache/shiro/realm/text/PropertiesRealm.java