startup delay added

include/configuration.h

@@ -169,6 +169,7 @@ public:
     bool                    backupDigiMode;
     bool                    rebootMode;
     int                     rebootModeTime;
+    int                     startupDelay;
     String                  personalNote;
     String                  blacklist;
     std::vector<WiFi_AP>    wifiAPs;

include/utils.h

@@ -46,6 +46,7 @@ namespace Utils {
     void    checkRebootTime();
     void    checkSleepByLowBatteryVoltage(uint8_t mode);
     bool    checkValidCallsign(const String& callsign);
+    void    startupDelay();
 
 }