Where is Capsicum?

I've read about Capsicum on a superficial level, but I don't know / understand the finer details.

I was hoping it would be discussed in the Handbook, but I don't see Capsicum mentioned there. Did I just miss it? There is a chapter on Mandatory Access Control - is that it?

Is Capsicum something that has been absorbed into FreeBSD, so its various features are now known under different names? Is that why I can't find anything about it in the handbook?
 
Maybe below links might give you starting point:

View: https://www.youtube.com/watch?v=aXby7dnmEOI


Full paper of watsons presentation:
 
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