netlink/netlink_linux.go
func AddToBridge(iface, master *net.Interface) error {
	return ifIoctBridge(iface, master, SIOC_BRADDIF)
}
func AddToBridge(iface, master *net.Interface) error {
	return ifIoctBridge(iface, master, SIOC_BRADDIF)
}
// Add a slave to a bridge device.  This is more backward-compatible than
// netlink.NetworkSetMaster and works on RHEL 6.