* default configuration file (<<var_cf_def_file,`cf_def_file`>>) and processing
* configuration options. The calling convention is the same as with GNU getopt_long(),
* but you must prefix your own short/long options by the
* default configuration file (<<var_cf_def_file,`cf_def_file`>>) and processing
* configuration options. The calling convention is the same as with GNU getopt_long(),
* but you must prefix your own short/long options by the