Revert "OS-871 zone stuck in shutting_down - waiting for kernel thread nfsauth_refresh_thread to terminate"
This reverts commit 887d2a84c612cea61b6ad544f54cf790cfb9de3e.

*** 18,28 ****
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
-  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T         */
  /*        All Rights Reserved   */
  
--- 18,27 ----
*** 174,190 ****
              can_do_mlp ? PRIV_NET_BINDMLP : NULL, NULL) == -1) {
                  (void) fprintf(stderr, "%s should be run with"
                      " sufficient privileges\n", av[0]);
                  exit(1);
          }
- 
-         /* Nfsd cannot run in a non-global zone. */
-         if (getzoneid() != GLOBAL_ZONEID) {
-                 (void) fprintf(stderr, "%s: can only run in the global zone\n",
-                     av[0]);
-                 exit(1);
-         }
  
          (void) enable_extended_FILE_stdio(-1, -1);
  
          /*
           * Read in the values from SMF first before we check
--- 173,182 ----