* exceptions.cc (set_signal_mask): Remove useless debugging output.

* fhandler.cc (fhandler_base::write): Ditto.
(fhandler_base_overlapped::close): Cancel any ongoing I/O before closing.
* syscalls.cc (write): Default to always reporting all writes in strace output
via syscall_printf.
* wait.cc (wait4): Fix debugging output.  Use standard syscall leaver output.

winsup/cygwin/exceptions.cc

@@ -1144,8 +1144,6 @@ set_signal_mask (sigset_t newmask, sigset_t& oldmask)
   oldmask = newmask;
   if (mask_bits)
     sig_dispatch_pending (true);
-  else
-    sigproc_printf ("not calling sig_dispatch_pending");
   mask_sync.release ();
 }