2.3. POD, Pod::Usage and Friends

    my $variant = $self->{'default_variant'};
    my $help = 0;
    my $man = 0;

    Getopt::Long::Configure('pass_through');
    GetOptions(
        "g|game=s" => \$variant,
        'help|h|?' => \$help,
        'man' => \$man
        ) or pod2usage(2);

    pod2usage(1) if $help;
    pod2usage(-exitstatus => 0, -verbose => 2) if $man;