Function dhcpv6_client_start

pub unsafe extern "C" fn dhcpv6_client_start()

@brief Let the server start listening

@pre @ref dhcpv6_client_init() was called (i.e. the internal event queue of he client was set).

This needs to be called after all desired [configuration functions] (@ref net_dhcpv6_client_conf) and @ref dhcpv6_client_init() were called.