win_reboot - Fix rc validation when using psrp and add extra docs (#53711)

* win_reboot - Fix rc validation when using psrp and add extra docs

* Revert boot time command and fix docs

changelogs/fragments/win_reboot-psrp.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- win_reboot - Fix reboot command validation failure when running under the psrp connection plugin

lib/ansible/modules/windows/win_reboot.py

@@ -65,6 +65,10 @@ notes:
 - If a shutdown was already scheduled on the system, C(win_reboot) will abort the scheduled shutdown and enforce its own shutdown.
 - Beware that when C(win_reboot) returns, the Windows system may not have settled yet and some base services could be in limbo.
   This can result in unexpected behavior. Check the examples for ways to mitigate this.
+- The connection user must have the C(SeRemoteShutdownPrivilege) privilege enabled, see
+  U(https://docs.microsoft.com/en-us/windows/security/threat-protection/security-policy-settings/force-shutdown-from-a-remote-system)
+  for more information.
+  some Windows hosts.
 seealso:
 - module: reboot
 author:

lib/ansible/plugins/action/win_reboot.py

@@ -49,7 +49,7 @@ class ActionModule(RebootActionModule, ActionBase):
     def perform_reboot(self, task_vars, distribution):
         shutdown_command = self.get_shutdown_command(task_vars, distribution)
         shutdown_command_args = self.get_shutdown_command_args(distribution)
-        reboot_command = '{0} {1}'.format(shutdown_command, shutdown_command_args)
+        reboot_command = self._connection._shell._encode_script('{0} {1}'.format(shutdown_command, shutdown_command_args))
 
         display.vvv("{action}: rebooting server...".format(action=self._task.action))
         display.debug("{action}: distribution: {dist}".format(action=self._task.action, dist=distribution))
@@ -66,7 +66,8 @@ class ActionModule(RebootActionModule, ActionBase):
             display.warning('A scheduled reboot was pre-empted by Ansible.')
 
             # Try to abort (this may fail if it was already aborted)
-            result1 = self._low_level_execute_command('shutdown /a', sudoable=self.DEFAULT_SUDOABLE)
+            result1 = self._low_level_execute_command(self._connection._shell._encode_script('shutdown /a'),
+                                                      sudoable=self.DEFAULT_SUDOABLE)
 
             # Initiate reboot again
             result2 = self._low_level_execute_command(reboot_command, sudoable=self.DEFAULT_SUDOABLE)