qmp-events: move 'POWERDOWN' doc to schema

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

docs/qmp-events.txt

@@ -114,19 +114,6 @@ Data:
   "timestamp": { "seconds": 1368697518, "microseconds": 326866 } }
 }
 
-POWERDOWN
----------
-
-Emitted when the Virtual Machine is powered down through the power
-control system, such as via ACPI.
-
-Data: None.
-
-Example:
-
-{ "event": "POWERDOWN",
-    "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
-
 QUORUM_FAILURE
 --------------
 

qapi/event.json

@@ -30,6 +30,12 @@
 # system, such as via ACPI.
 #
 # Since: 0.12.0
+#
+# Example:
+#
+# <- { "event": "POWERDOWN",
+#      "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
+#
 ##
 { 'event': 'POWERDOWN' }