2594 implement graceful shutdown for local zones in zoneadm

*** 21,30 ****
--- 21,32 ----
   CDDL HEADER END
  
   Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  
   DO NOT EDIT THIS FILE.
+ 
+  Copyright 2014 Nexenta Systems, Inc. All rights reserved.
  -->
  
  <!--
    verify_cfg
  
*** 164,173 ****
--- 166,196 ----
  -->
  <!ELEMENT halt  (#PCDATA) >
  <!ATTLIST halt>
  
  <!--
+   shutdown
+ 
+     This is a program which gets run by zoneadmd when a zone is being
+     shutdown gracefully. Currently only asynchronous mode is supported.
+ 
+     If this program succeeds it should not generate any output. If this
+     program returns an error, any output generated by the program will be
+     sent to the zoneadmd message log.
+ 
+     The following replacements are performed:
+ 
+       %z        Name of zone
+       %R        Zonepath of zone
+       Additional arguments, if any, are appended.
+ 
+     It has no attributes.
+ -->
+ <!ELEMENT shutdown      (#PCDATA) >
+ <!ATTLIST shutdown>
+ 
+ <!--
    modname
  
      Path to the kernel module that implements the kernel-level
      functionality of the brand.
  
*** 605,617 ****
                  directory in which the configuration file is stored.
  -->
  
  <!ELEMENT brand         (modname?, initname, login_cmd, forcedlogin_cmd,
                          user_cmd, install,
!                         installopts?, boot?, sysboot?, halt?, verify_cfg?,
!                         verify_adm?, postattach?, postclone?, postinstall?,
!                         predetach?, attach?, detach?, clone?,
                          presnap?, postsnap?, validatesnap?,
                          preuninstall?, uninstall?,
                          prestatechange?, poststatechange?, query?,
                          privilege+)>
  
--- 628,640 ----
                  directory in which the configuration file is stored.
  -->
  
  <!ELEMENT brand         (modname?, initname, login_cmd, forcedlogin_cmd,
                          user_cmd, install,
!                         installopts?, boot?, sysboot?, halt?, shutdown?,
!                         verify_cfg?, verify_adm?, postattach?, postclone?,
!                         postinstall?, predetach?, attach?, detach?, clone?,
                          presnap?, postsnap?, validatesnap?,
                          preuninstall?, uninstall?,
                          prestatechange?, poststatechange?, query?,
                          privilege+)>