In certain cases it is needed not only to provide configurations for the configuration admin service but to add additional configuration files e.g. a configuration file for jetty (jetty.xml). It even might be help full to deploy a configuration file instead of a configuration for the config admin service since. To achieve this the attribute finalname shows the final destination of the configfile, while the value references the Maven artifact to deploy.
<configfile
finalname="/etc/jetty.xml">mvn:org.apache.karaf/apache-karaf/ \\
${project.version}/xml/jettyconfig</configfile>