[system] various update

- flight recorder
- configurable power switch init
- configurable chibios AP stacks

conf/telemetry/fixedwing_flight_recorder.xml

@@ -36,6 +36,7 @@
       <message name="AIR_DATA"            period="1.3"/>
       <message name="ESC"                 period="0.9"/>
       <message name="LOGGER_STATUS"       period="5.1"/>
+      <message name="WIND_INFO_RET"       period="0.1"/>
     </mode>
     <mode name="minimal">
       <message name="ALIVE"               period="5"/>

sw/airborne/autopilot.c

@@ -103,7 +103,11 @@ void autopilot_init(void)
   autopilot.power_switch = false;
 #ifdef POWER_SWITCH_GPIO
   gpio_setup_output(POWER_SWITCH_GPIO);
-  gpio_clear(POWER_SWITCH_GPIO); // POWER OFF
+#ifdef POWER_SWITCH_ENABLE
+  autopilot_set_power_switch(POWER_SWITCH_ENABLE); // set initial status
+#else
+  gpio_clear(POWER_SWITCH_GPIO); // by default POWER OFF
+#endif
 #endif
 
   // call firmware specific init

sw/airborne/firmwares/fixedwing/main_chibios.c

@@ -53,18 +53,32 @@
 #include "subsystems/datalink/downlink.h"
 #endif
 
+/*
+ * Default autopilot thread stack size
+ */
+#ifndef AP_THREAD_STACK_SIZE
+#define AP_THREAD_STACK_SIZE 8192
+#endif
+
 /*
  * PPRZ/AP thread
  */
 static void thd_ap(void *arg);
-static THD_WORKING_AREA(wa_thd_ap, 8192);
+static THD_WORKING_AREA(wa_thd_ap, AP_THREAD_STACK_SIZE);
 static thread_t *apThdPtr = NULL;
 
+/*
+ * Default FBW thread stack size
+ */
+#ifndef FBW_THREAD_STACK_SIZE
+#define FBW_THREAD_STACK_SIZE 1024
+#endif
+
 /*
  * PPRZ/FBW thread
  */
 static void thd_fbw(void *arg);
-static THD_WORKING_AREA(wa_thd_fbw, 1024);
+static THD_WORKING_AREA(wa_thd_fbw, FBW_THREAD_STACK_SIZE);
 static thread_t *fbwThdPtr = NULL;
 
 /**