14019 Allow more control over zone init exit actions
Portions contributed by: Joshua M. Clulow <jmc@joyent.com>
Portions contributed by: Andy Fiddaman <andy@omnios.org>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Gordon Ross <Gordon.W.Ross@gmail.com>
Approved by: Robert Mustacchi <rm@fingolfin.org>

*** 190,209 ****
  
      It has no attributes.  --> <!ELEMENT initname (#PCDATA) > <!ATTLIST
  initname>
  
  <!--
!   restartinit
  
!     Boolean indicating that the program specified by the initname attr
!     should be restarted, or not, if it exits.  By default, the init program
!     will be restarted if this attribute is not provided.  Specifying false
!     for this attr will prevent that.
  
!     It has no attributes.  --> <!ELEMENT restartinit   (#PCDATA) > <!ATTLIST
! restartinit>
  
  <!--
    login_cmd
  
      Path to the initial login binary that should be executed when
      attempting to zlogin into a branded zone.
--- 190,226 ----
  
      It has no attributes.  --> <!ELEMENT initname (#PCDATA) > <!ATTLIST
  initname>
  
  <!--
!   restartinit, restartinit0 and restartinitreboot
  
!     These three boolean elements control what action is taken when the
!     program specified by the 'initname' element exits.
  
!     The default values are:
  
+         restartinit:       true
+         restartinit0:      false
+         restartinitreboot: false
+ 
+     If 'restartinit' is set to false then the init process will never be
+     restarted and the zone will shut down once init exits. In this case, the
+     other restartinit elements are ignored.
+ 
+     When 'restartinit0' is set, init will only be restarted if it exited with
+     an exit status of 0, otherwise the zone will shut down.
+ 
+     If 'restartinitreboot' is set to true then whenever init should be
+     restarted, based on the other restartinit elements, the zone will instead
+     be rebooted.
+ 
+     These have no attributes.  --> <!ELEMENT restartinit    (#PCDATA) >
+ <!ATTLIST restartinit> <!ELEMENT restartinit0     (#PCDATA) > <!ATTLIST
+ restartinit0> <!ELEMENT restartinitreboot    (#PCDATA) > <!ATTLIST
+ restartinitreboot>
+ 
  <!--
    login_cmd
  
      Path to the initial login binary that should be executed when
      attempting to zlogin into a branded zone.
*** 572,582 ****
      Its attributes are
  
        name     The name of the brand.  This must match the name of the
            directory in which the configuration file is stored.  -->
  
! <!ELEMENT brand          (modname?, initname, restartinit?, 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?,
--- 589,600 ----
      Its attributes are
  
        name     The name of the brand.  This must match the name of the
            directory in which the configuration file is stored.  -->
  
! <!ELEMENT brand          (modname?, initname, restartinit?,
!                restartinit0?, restartinitreboot?,                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?,