navigator: mission feasibility checker: check for a takeoff waypoint on mission on specific conditions

src/modules/navigator/mission_params.c

@@ -57,6 +57,16 @@
  */
 PARAM_DEFINE_FLOAT(MIS_TAKEOFF_ALT, 2.5f);
 
+/**
+ * Take-off waypoint required
+ *
+ * If set, the mission feasibility checker will check for a takeoff waypoint on the mission.
+ *
+ * @boolean
+ * @group Mission
+ */
+PARAM_DEFINE_INT32(MIS_TAKEOFF_REQ, 0);
+
 /**
  * Minimum Loiter altitude
  *