Function vnet_feature_enable_disable 

pub unsafe extern "C" fn vnet_feature_enable_disable(
    arc_name: *const c_char,
    node_name: *const c_char,
    sw_if_index: u32_,
    enable_disable: c_int,
    feature_config: *mut c_void,
    n_feature_config_bytes: u32_,
) -> c_int