Creates the arg parsers needed for the config command and
    its subcommands.

def add_config_parser(subparsers, parent_parser):
    """Creates the arg parsers needed for the config command and
    its subcommands.
    """
    parser = subparsers.add_parser(
        'config',
        help='Changes genesis block settings and create, view, and '
        'vote on settings proposals',
        description='Provides subcommands to change genesis block settings '
                    'and to view, create, and vote on existing proposals.'
    )

    config_parsers = parser.add_subparsers(title="subcommands",
                                           dest="subcommand")
    config_parsers.required = True