Macvlan mode

[kvaps]

Hi, this PR allows to use bridges with macvlan interfaces, and attach them directly to bridges.

[hookenz]

@kvaps - Why not set MACVLAN_MODE=1 set inside error that originally printed the error message that it wasn't supported, thereby making the command line option unnecessary. And the original error redundant. i.e. the mode becomes automatic.

[kvaps]

Hi @hookenz,
Using macvlan on top of bridges is quite specific configuration. Usually better to attach macvlan device on top interface from your bridge.
Maybe we need to improve error message.

[kvaps]

@hookenz sorry, I'm kicking nonsense :)
You can't use top interface of the bridge, because it is already belongs to the bridge interface:

RTNETLINK answers: Device or resource busy

[kvaps]

I'll close this, becuase found better solution: #227