On Friday 11 March 2016 18:02:48 Dominik Heidler wrote:
> The server will only overwrite the mac if it is zero.
> Ths allows acting in place of (non-alfred) legacy clients
> by injecting their data with the correct source mac.
> 
> Signed-off-by: Dominik Heidler <dominik@heidler.eu>

Thanks! I've did some style changes (declaration up, !memcmp -> memcmp() == 0) 
and applied it in revision 58e1099

Thank you!
      Simon