get rid of 'broadcast' argument when configuring the tun device

get rid of 'broadcast' argument when configuring the tun device

The broadcast argument is actually useless as every platform will figure
it out and configure it on its own. We even realized that on linux, if
you configure it wrong, nothing wrong will happen.

At this point, let's make the code cleaner and let's get rid of this
useless argument at all.

This patch just removed any occurrence of 'broadcast'.

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20191110124407.8734-1-a@unstable.cc>
URL: https://www.mail-archive.com/search?l=mid&q=20191110124407.8734-1-a@unstable.cc
Signed-off-by: Gert Doering <gert@greenie.muc.de>