Function libmosquitto_sys::mosquitto_connect_with_flags_callback_set

pub unsafe extern "C" fn mosquitto_connect_with_flags_callback_set(
    mosq: *mut mosquitto, 
    on_connect: Option<unsafe extern "C" fn(arg1: *mut mosquitto, arg2: *mut c_void, arg3: c_int, arg4: c_int)>
)