pthread_join(3) on FreeBSD

The text 462116b09318, as FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE, FreeBSD 3.0-RELEASE, FreeBSD 2.2.9-RELEASE, FreeBSD 2.2.8-RELEASE shipped it.

wait for thread termination

pthread_join(3) on FreeBSD now