some timezone corrections to UTC, write readme

@AttendanceTracker/addons/AttendanceTracker/functions/fn_callbackHandler.sqf

@@ -55,6 +55,15 @@ addMissionEventHandler ["ExtensionCallback", {
 					]
 				];
 				
+				missionNamespace setVariable ["AttendanceTracker_DBConnected", true];
+			};
+		};
+		case "writeWorldInfo": {
+			if (_response#0 == "WORLD_ID") then {
+				AttendanceTracker_worldId = _response#1;
+
+				// world info written. mission info depends on that, so now we'll write it
+
 				// log mission info and get back the row Id to send with future messages
 				private _response = "AttendanceTracker" callExtension [
 					"logMission",
@@ -62,12 +71,11 @@ addMissionEventHandler ["ExtensionCallback", {
 						[AttendanceTracker getVariable ["missionContext", createHashMap]] call CBA_fnc_encodeJSON
 					]
 				];
-
-				missionNamespace setVariable ["AttendanceTracker_DBConnected", true];
 			};
 		};
 		case "writeMission": {
 			if (_response#0 == "MISSION_ID") then {
+				// mission has written so lets finish out init and set missionId for the returned PK, activating the ability for attendance records to send.
 				AttendanceTracker_missionId = _response#1;
 			};
 		};

@AttendanceTracker/addons/AttendanceTracker/functions/fn_postInit.sqf

@@ -40,6 +40,19 @@ AttendanceTracker setVariable ["missionContext", createHashMapFromArray [
 AttendanceTracker setVariable ["allUsers", createHashMap];
 AttendanceTracker setVariable ["rowIds", createHashMap];
 
+// update the extension with the current server time to identify restarts
+[
+	{
+		'AttendanceTracker' callExtension [
+			"updateServerTime",
+			[
+				round(diag_tickTime)
+			]
+		]
+	},
+	30
+] call CBA_fnc_addPerFrameHandler;
+
 {
 	if (!isServer) exitWith {};
 	_x params ["_ehName", "_code"];

@AttendanceTracker/addons/AttendanceTracker/functions/fn_timestamp.sqf

@@ -13,7 +13,7 @@ systemTimeUTC apply {if (_x < 10) then {"0" + str _x} else {str _x}} params [
 ];
 
 format[
-	"%1-%2-%3 %4:%5:%6",
+	"%1-%2-%3T%4:%5:%6.000Z",
 	_year,
 	_month,
 	_day,

@AttendanceTracker/addons/AttendanceTracker/functions/fn_writeConnect.sqf

@@ -19,7 +19,10 @@ _hash set ["isJIP", _isJIP];
 _hash set ["roleDescription", _roleDescription];
 
 [
-	{missionNamespace getVariable ["AttendanceTracker_DBConnected", false]},
+	{
+		missionNamespace getVariable ["AttendanceTracker_DBConnected", false] &&
+		missionNamespace getVariable ["AttendanceTracker_missionId", -1] > 0
+	},
 	{"AttendanceTracker" callExtension ["writeAttendance", [[_this] call CBA_fnc_encodeJSON]]},
 	_hash, // args
 	30 // timeout in seconds. if DB never connects, we don't want these building up

@AttendanceTracker/addons/AttendanceTracker/functions/fn_writeDisconnect.sqf

@@ -19,7 +19,10 @@ _hash set ["isJIP", _isJIP];
 _hash set ["roleDescription", _roleDescription];
 
 [
-	{missionNamespace getVariable ["AttendanceTracker_DBConnected", false]},
+	{
+		missionNamespace getVariable ["AttendanceTracker_DBConnected", false] &&
+		missionNamespace getVariable ["AttendanceTracker_missionId", -1] > 0
+	},
 	{"AttendanceTracker" callExtension ["writeDisconnectEvent", [[_this] call CBA_fnc_encodeJSON]]},
 	_hash, // args
 	30 // timeout in seconds. if DB never connects, we don't want these building up

@AttendanceTracker/config.example.json

@@ -8,6 +8,8 @@
   },
   "armaConfig": {
     "dbUpdateIntervalSeconds": 90,
+    "serverEventFillNullMinutes": 90,
+    "missionEventFillNullMinutes": 15,
     "debug": false
   }
 }