wip: squashed patch

msg/custom_action_status.msg

@@ -0,0 +1,16 @@
+uint64 timestamp                        # time since system start (microseconds)
+
+uint8 STATUS_ACTION_ACCEPTED     = 0
+uint8 STATUS_ACTION_STARTED      = 1
+uint8 STATUS_ACTION_SUCCEEDED    = 2
+uint8 STATUS_ACTION_CANCELLED    = 3
+uint8 STATUS_ACTION_FAILED       = 4
+uint8 STATUS_ACTION_TIMED_OUT    = 5
+
+int8 REACTION_IGNORE             = 0
+int8 REACTION_LOITER             = 1
+int8 REACTION_RTL                = 2
+
+int8 action_id                          # ID of current action. -1 for none.
+uint8 status                            # Current status of custom actions
+uint8 failure_reaction                  # Reaction performed because of failed custom action