* cygtls.h (_cygtls): Perform minor reformatting.

* winsup.h (close_all_files): Reflect argument change.
* dtable.cc (close_all_files): Ditto.
* dtable.h: Ditto.
* fhandler.h: Ditto.
* spawn.cc (spawn_guts): Move close_all_files back to its original location in
first P_OVERLAY test but use argument denoting that handles are only supposed
to be closed, not released (more work to be done here).
* syscalls.cc (close_all_files): Take an argument denoting whether to release
closed files or not.
* path.cc (symlink): Change argument names to reflect linux man page.
(symlink_worker): Ditto.  Also appropriately set ENOENT for empty strings.

winsup/cygwin/spawn.cc

@@ -800,6 +800,7 @@ spawn_guts (const char * prog_arg, const char *const *argv,
       strace.execing = 1;
       myself.hProcess = hExeced = pi.hProcess;
       strcpy (myself->progname, real_path); // FIXME: race?
+      close_all_files (true);
       sigproc_printf ("new process name %s", myself->progname);
       /* If wr_proc_pipe doesn't exist then this process was not started by a cygwin
 	 process.  So, we need to wait around until the process we've just "execed"
@@ -869,7 +870,6 @@ spawn_guts (const char * prog_arg, const char *const *argv,
   switch (mode)
     {
     case _P_OVERLAY:
-      close_all_files ();
       if (!synced)
 	/* let myself.exit handle this */;
       else if (myself->wr_proc_pipe)