========================================================
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