sub parse_cfg_lines {
    my ($input) = @_;
    return undef if !defined($input) || $input eq '';

    my @ary = split(/\n/, $input);

    my @out;

    foreach my $line (@ary) {

        chomp($line); # get rid of \n if present
        $line =~ s/\r//g;

        my %hash = ('commented' => 0);

        next if ($line =~ /^\s*$/); # ignore blank lines
        $hash{'commented'} = 1 if ($line =~ /^\s*;/);
        return undef if ($line !~ /([^ \t;=>]+)\s*=>?\s*(.*)/);
        $hash{'var_name'} = $1;
        $hash{'var_val'}  = $2;
        push(@out, \%hash);
    }
    \@out;
}