important:

* PIThread::~PIThread() now unregister itself from introspection, if terminates than show warning
 * PISystemMonitor now correctly stops
 * PIPeer now can correctly stopAndWait
 * PIPeer::destroy(), protected method for close all eths and threads
 * new PIINTROSPECTION_STOP macro
 * Introspection now can be correctly stopped by macro, more safety

ClientServer:
 * ClientBase::close() stop and disconnect channel
 * Server clients clean-up now event-based
 * No warnings on client destructor

libs/main/introspection/piintrospection_server.h

@@ -33,6 +33,11 @@
 //! \~russian Запускает сервер интроспекции с именем "name"
 #  define PIINTROSPECTION_START(name)
 
+//! \ingroup Introspection
+//! \~english Stop introspection server
+//! \~russian Останавливает сервер интроспекции
+#  define PIINTROSPECTION_STOP
+
 #else
 
 #  if defined(PIP_INTROSPECTION) && !defined(PIP_FORCE_NO_PIINTROSPECTION)
@@ -44,6 +49,7 @@ class PISystemMonitor;
 
 #	define PIINTROSPECTION_SERVER      (PIIntrospectionServer::instance())
 #	define PIINTROSPECTION_START(name) PIINTROSPECTION_SERVER->start(#name);
+#	define PIINTROSPECTION_STOP        PIINTROSPECTION_SERVER->stop();
 
 class PIP_EXPORT PIIntrospectionServer: public PIPeer {
 	PIOBJECT_SUBCLASS(PIIntrospectionServer, PIPeer);
@@ -52,6 +58,7 @@ public:
 	static PIIntrospectionServer * instance();
 
 	void start(const PIString & server_name);
+	void stop();
 
 private:
 	PIIntrospectionServer();
@@ -59,17 +66,17 @@ private:
 	NO_COPY_CLASS(PIIntrospectionServer);
 
 	PIString genName();
-	virtual void dataReceived(const PIString & from, const PIByteArray & data);
+	void dataReceived(const PIString & from, const PIByteArray & data) override;
 	EVENT_HANDLER(void, sysmonDeleted);
 
 	PRIVATE_DECLARATION(PIP_EXPORT)
-	PITimer itimer;
-	PISystemMonitor * sysmon;
+	PISystemMonitor * sysmon = nullptr;
 	PIMutex sysmon_mutex;
 };
 
 #  else
 #	define PIINTROSPECTION_START(name)
+#	define PIINTROSPECTION_STOP
 #  endif
 
 #endif // DOXYGEN