OS-4825 cgroup user agent should be launched from the kernel
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>

*** 19,28 ****
--- 19,29 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright 2016 Joyent, Inc.
   */
  
  /*
   * Contracts
   * ---------
*** 285,295 ****
      ctflags_t flags, proc_t *author, int canfail)
  {
          avl_index_t where;
          klwp_t *curlwp = ttolwp(curthread);
  
!         ASSERT(author == curproc);
  
          mutex_init(&ct->ct_lock, NULL, MUTEX_DEFAULT, NULL);
          mutex_init(&ct->ct_reflock, NULL, MUTEX_DEFAULT, NULL);
          mutex_init(&ct->ct_evtlock, NULL, MUTEX_DEFAULT, NULL);
          ct->ct_id = id_alloc(contract_ids);
--- 286,299 ----
      ctflags_t flags, proc_t *author, int canfail)
  {
          avl_index_t where;
          klwp_t *curlwp = ttolwp(curthread);
  
!         /*
!          * It's possible that author is not curproc if the zone is creating
!          * a new process as a child of zsched.
!          */
  
          mutex_init(&ct->ct_lock, NULL, MUTEX_DEFAULT, NULL);
          mutex_init(&ct->ct_reflock, NULL, MUTEX_DEFAULT, NULL);
          mutex_init(&ct->ct_evtlock, NULL, MUTEX_DEFAULT, NULL);
          ct->ct_id = id_alloc(contract_ids);