svn commit: r205024 - head/sys/net

[Qing Li]

>
> Is there any way we can pick up via an assertion that an interface driver has failed to implement this functionality? This has never been a historic requirement, so I suspect there are a lot of drivers floating around that fail to meet the requirement. Also, is this for IFT_ETHER only, or also other link types?
>

Not sure if I get the assertion suggestion. How would an assertion help here ?

-- Qing