In PR_JoinThread, we need to call pthread_detach after pthread_join

under DCE threads because DCE threads' pthread_detach does not reclaim
the terminated thread's resources.

nsprpub/pr/src/pthreads/ptthread.c

@@ -478,6 +478,10 @@ PR_IMPLEMENT(PRStatus) PR_JoinThread(PRThread *thred)
         PR_ASSERT(rv == 0 && result == NULL);
         if (0 == rv)
         {
+#ifdef _PR_DCETHREADS
+            rv = pthread_detach(&id);
+            PR_ASSERT(0 == rv);
+#endif
             _pt_thread_death(thred);
         }
         else