oce4 promiscous mode bug and carp

[Malte Gräbner]

> 
> BTW, there is open bug since 2015 without apparent interest to it.
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204326
> 

I can confirm the bug and patch on several/all Systems.

For anyone who is interessted:

CARP will be unable to handle traffic because of the virtual mac 
addresses of the vhid's. The frames for the vmacs will be dropped at 
hardware.

The Patch should be pushed urgently upstream to the release versions.

Fun Fact: the email contact in the oce manpage is not available anymore. 
I've contacted Broadcom. But there is still no response.