I'm finding all of these old bits from pre-2007

Edit config.pl for enabling youtube embed code to be pasted in Formatting:HTML mode

use constant ALLOWED_HTML => (

'a'=>{args=>{'href'=>'url'},forced=>{'rel'=>'nofollow'}},
'object'=>{forced=>{'width'=>'425','height'=>'350'}},
'param'=>{args=>{'value'=>'url'},forced=>{'name'=>'movie'}},
'embed'=>{args=>{'src'=>'url'},forced=>{'type'=>'application/x-shockwave-flash','wmode'=>'transparent','width'=>'425','height'=>'350'}},
'b'=>{},'i'=>{},'u'=>{},'sub'=>{},'sup'=>{},
'em'=>{},'strong'=>{},
'ul'=>{},'ol'=>{},'li'=>{},'dl'=>{},'dt'=>{},'dd'=>{},
'p'=>{},'br'=>{empty=>1},'blockquote'=>{},

);

But there is no reference to ALLOWED_HTML in the new builds. Can someone with a history tell me where that had been referenced?

Thanks!