* cygthread.cc (cygthread::stub): Reintroduce clearing of __name but do it

before SetEvent to eliminate a race.
(cygthread::terminate): Accumulate list of threads to check for termination and
call WaitForMultipleObjects on list rather than waiting for each thread
individually.
* sigproc.cc (subproc_init): Zap hwait_subproc thread handle since it is no
longer used.
* spawn.cc (spawn_guts): Fix so that cygthread::terminate is *really* called
only for exec.

winsup/cygwin/sigproc.cc

@@ -805,8 +805,9 @@ subproc_init (void)
    */
   events[0] = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
   hwait_subproc = new cygthread (wait_subproc, NULL, "proc");
+  hwait_subproc->zap_h ();
   ProtectHandle (events[0]);
-  sigproc_printf ("started wait_subproc thread %p", (HANDLE) *hwait_subproc);
+  sigproc_printf ("started wait_subproc thread");
 }
 
 /* Initialize some of the memory block passed to child processes