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

*** 19,29 ****
   * CDDL HEADER END
   */
  
  /*
   * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
-  * Copyright 2012 Joyent, Inc. All rights reserved.
   * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
   * Copyright 2016 Nexenta Systems, Inc.  All rights reserved.
   */
  
  /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
--- 19,28 ----
*** 484,500 ****
              can_do_mlp ? PRIV_NET_BINDMLP : NULL, NULL) == -1) {
                  (void) fprintf(stderr,
                      "%s: must be run with sufficient privileges\n",
                      argv[0]);
                  exit(1);
-         }
- 
-         /* Mountd cannot run in a non-global zone. */
-         if (getzoneid() != GLOBAL_ZONEID) {
-                 (void) fprintf(stderr, "%s: can only run in the global zone\n",
-                     argv[0]);
-                 exit(1);
          }
  
          if (getrlimit(RLIMIT_NOFILE, &rl) != 0) {
                  syslog(LOG_ERR, "getrlimit failed");
          } else {
--- 483,492 ----