ACL vs Capability

[TongKe Xue]

Is the plan to have Dragonfly be ACL or Capability (I see the word 
capability mentioned around here and there, but no conclusive doc saying 
"Dragonfly will be capability based control.)

If there will be support for the latter, is it correct to say that ACL == 
control at the level of trainualarity based on user running the process, 
Capability == control at the level of grainualarity of the process.

Thanks,
--TongKe