Throughout, change check for running under Windows NT to 'iswinnt'.

* dcrt0.cc (set_os_type): Set 'iswinnt' appropriately.
* cygheap.cc (init_cheap): Revert to using VirtualAlloc for allocating cygheap.
(cygheap_setup_for_child_cleanup): New function.  Standard function to call
after calling CreateProcess to cleanup cygheap info passed to child.
(cygheap_fixup_in_child): Copy cygheap from shared memory into allocated space
under Windows 9x or if can't relocate shared space under NT.
* cygheap.h: Declare new function.
* spawn.cc (spawn_guts): Use cygheap_fixup_in_child.
* fork.cc (fork_parent): Ditto.
* winsup.h: Declare iswinnt.

winsup/cygwin/delqueue.cc

@@ -87,7 +87,7 @@ delqueue_list::process_queue ()
 	    int res = GetLastError ();
 	    empty = 0;
 	    if (res == ERROR_SHARING_VIOLATION ||
-		(os_being_run != winNT && res == ERROR_ACCESS_DENIED))
+		(!iswinnt && res == ERROR_ACCESS_DENIED))
 	      {
 		/* File still inuse, that's ok */
 		syscall_printf ("Still using %s", name[i]);