* hookapi.cc (find_first_notloaded_dll): New function.

* pinfo.cc (status_exit): New function.  Issue message when dll not found.  Use
find_first_notloaded_dll to find a nonexistent dll.
(pinfo::maybe_set_exit_code_from_windows): Call status_exit when exit code >=
0xc0000000UL.
* sigproc.cc (child_info::proc_retry): Return exit code when
STATUS_DLL_NOT_FOUND.
* spawn.cc (spawn_guts): Minor cleanup.
* syscalls.cc (close_all_files): Don't actually close stderr filehandle.  Just
make it noninheritable.
* winsup.h (find_first_notloaded_dll): Declare new function.
* ntdll.h: Add several missing NTSTATUS defines.

winsup/cygwin/exceptions.cc

@@ -153,7 +153,7 @@ open_stackdumpfile ()
 				   p, strlen (p)) * sizeof (WCHAR);
       RtlAppendUnicodeToString (&ucore, L".stackdump");
       /* Create an object attribute which refers to <progname>.stackdump
-         in Cygwin's cwd. */
+	 in Cygwin's cwd. */
       InitializeObjectAttributes (&attr, &ucore, OBJ_CASE_INSENSITIVE,
 				  cygheap->cwd.get_handle (), NULL);
       HANDLE h;