paxcounter.conf: added time sync retry setting

src/paxcounter.conf

@@ -67,6 +67,7 @@
 
 // settings for syncing time of node with external time source
 #define TIME_SYNC_INTERVAL              0       // sync time attempt each .. minutes from time source (GPS/LORA/RTC) [default = 60], 0 means off
+#define TIME_SYNC_INTERVAL_RETRY        0       // retry time sync after lost sync each .. minutes [default = 10], 0 means off
 #define TIME_SYNC_COMPILEDATE           0       // set to 1 to use compile date to initialize RTC after power outage [default = 0]
 #define TIME_SYNC_LORAWAN               0       // set to 1 to use LORA network as time source, 0 means off [default = 0]
 #define TIME_SYNC_TIMESERVER            0       // set to 1 to use LORA timeserver as time source, 0 means off [default = 0]

src/timekeeper.cpp

@@ -43,7 +43,7 @@ time_t timeProvider(void) {
   t = get_rtctime();
   if (t) {
     timeSource = _rtc;
-    timesyncer.attach(60, timeSync); // short retry
+    timesyncer.attach(TIME_SYNC_INTERVAL_RETRY * 60, timeSync); // short retry
   }
 #endif
 
@@ -57,7 +57,7 @@ time_t timeProvider(void) {
 
   if (!t) {
     timeSource = _unsynced;
-    timesyncer.attach(60, timeSync); // short retry
+    timesyncer.attach(TIME_SYNC_INTERVAL_RETRY * 60, timeSync); // short retry
   }
 
   return t;
@@ -138,7 +138,6 @@ void IRAM_ATTR CLOCKIRQ(void) {
     portYIELD_FROM_ISR();
 }
 
-
 // helper function to check plausibility of a time
 time_t timeIsValid(time_t const t) {
   // is it a time in the past? we use compile date to guess
@@ -204,7 +203,6 @@ void clock_init(void) {
   assert(ClockTask); // has clock task started?
 } // clock_init
 
-
 void clock_loop(void *taskparameter) { // ClockTask
 
   // caveat: don't use now() in this task, it will cause a race condition

src/timesync.cpp

@@ -160,8 +160,7 @@ void process_timesync_req(void *taskparameter) {
     I2C_MUTEX_UNLOCK();
 
     timeSource = _lora;
-    timesyncer.attach(TIME_SYNC_INTERVAL * 60,
-                      timeSync); // set to regular repeat
+    timesyncer.attach(TIME_SYNC_INTERVAL * 60, timeSync); // regular repeat
     ESP_LOGI(TAG, "[%0.3f] Timesync finished, time was adjusted",
              millis() / 1000.0);
   } else