* parse_config_files(mainconfig=/etc/grml/grml-live.conf, localconfig=/etc/grml/grml-live.local): read /etc/grml/grml-live.local and /etc/grml/grml-live.conf
* cmdline_opts(): parse commandline, overrides configuration from parse_config()
* parse_config_files(mainconfig=/etc/grml/grml-live.conf, localconfig=/etc/grml/grml-live.local): read /etc/grml/grml-live.local and /etc/grml/grml-live.conf
* cmdline_opts(): parse commandline, overrides configuration from parse_config()