* A pointer to this function should be passed as part of the
* 'struct GNUNET_GETOPT_CommandLineOption' array to initialize options
* of this type. It should be followed by a pointer to a value of
* A pointer to this function should be passed as part of the
* 'struct GNUNET_GETOPT_CommandLineOption' array to initialize options
* of this type. It should be followed by a pointer to a value of