turn: check fd deref cleanup on turn worker thread

[jobo-zt]

No description provided.

[jobo-zt]

Discovered during testing。

thread 1
thrd_t *thrd= thrd_current();

thread 2
thrd_equal(thrd, thrd_current());

GetThreadId(thrd_current()) return ok. but GetThreadId(thrd) return err. thrd in thread 1
so fun thrd_equal return err.

I wrote a test program, but the problem doesn't always occur.

[jobo-zt]

1. we may need to use the function get_thread_id() in trace.c instead.
2. we need to confirm whether thrd_equal will affect the re module.