> Erik, please review. I apologize for the delay. I see that you've already applied this, and it's mostly LGTM except I have one thing I'm not seeing clearly.
The documentation accept_dad now claims: DAD operation and mode on a given interface will be selected according to the maximum value of conf/{all,interface}/accept_dad. but I'm try to square this with my reading of the changes to addrconf_dad_begin(). I think setting all.accept_dad to 0 but ifname.accept_dad to non-0 still results in the short-circuit call to addrconf_dad_completed(). Am I just not seeing (thinking) straight?
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