Bug fixing

+ DB access is now right and uses copied sessions
+ DB session is now specifying the safe state and the mode
+ Fixed the issue with too early ICCC messages regarding to late cache
+ Add the MIME type for Dart
+ Fixed the issuse with wrong order of shutdown handlers
- TODO: Testing of these changes

System/Init.go

@@ -78,11 +78,17 @@ func initSystem() {
 	Log.LoggingIsReady()
 
 	// Register all system shutdown handlers:
+	//
+	// Please notice: If the shutdown event occurs ...
+	//		* all application handlers are called (order: last comed, first served)
+	//		* then, these system handlers are called (order: last comed, first served)
+	//		* and finally, the logging device / system gets closed
 	Shutdown.InitShutdown()
 	Shutdown.AddShutdownHandler(ICCC.ShutdownFunction{})
 	Shutdown.AddShutdownHandler(NumGen.ShutdownFunction{})
 	Shutdown.AddShutdownHandler(ConfigurationDB.ShutdownFunction{})
 	Shutdown.AddShutdownHandler(CustomerDB.ShutdownFunction{})
+
 	// The logging subsystem is not registered here, because it will be automated called at the end
 
 	// Register all system ICCC commands: