* 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
peri4
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