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 Inputs:
    REQUIRED:
        $domainname - Domain name
        $num - Number of keywords to return (>1)

    OPTIONAL:
        $adu - Adult filter on/off (1/0)
        $del - Delimiter (comma, newline)
        $quo - Quotes on (around each keyword)
        $alg - Algorithm to use:
                        - pw: Pure weight
                        - perc: Based on weight percentage
        $perc = Percentage of points to use with 'perc' algorithm

        $type - (default) popular
                related - related data source /data/www/related/www

 Outputs:
        Comma-delimited list of lowercase keywords