Warning: The main program customization variables associated with arrays are not documented.
Customization variables for the main program associated with an array of values
are handled differently. Two functions can be used in init files,
texinfo_add_to_option_list to add values to the array and
texinfo_remove_from_option_list to remove values from the array
associated with the customization variable:
$variable_name is the name of the variable; the values in the
array reference $variable_values_array_reference are added to the
list associated with the variable with texinfo_add_to_option_list, and removed with
texinfo_remove_from_option_list.