* exceptions.cc (_cygtls::interrupt_setup): Implement SA_RESETHAND.

* include/cygwin/signal.h: Define SA_ONESHOT and SA_NOMASK.
* dcrt0.cc (get_cygwin_startup_info): Remove commented out code.

winsup/cygwin/dcrt0.cc

@@ -623,15 +623,8 @@ get_cygwin_startup_info ()
 	    if (res->straced)
 	      {
 		res->ready (false);
-#if 0
-		DWORD prio = GetThreadPriority (GetCurrentThread ());
-		SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_IDLE);
-#endif
 		for (unsigned i = 0; !being_debugged () && i < 10000; i++)
 		  low_priority_sleep (0);
-#if 0
-		SetThreadPriority (GetCurrentThread (), prio);
-#endif
 		strace.hello ();
 	      }
 	    break;