Cross referencing in Ddoc

[Walter Bright]

On 12/30/2013 8:23 AM, Andrei Alexandrescu wrote:
> Oh the default is to link and then disable manually? That's still manual, just
> the default is different :o). I can work with that.

As I mentioned elsewhere, I dislike the requirement to use the inverse feature. 
Consider maintenance - I add a symbol, and then have to grep the rest of the 
module for any inadvertent collisions? Features should be positive ones, not 
negative.