Re-create client_service after stopping client's runloop and let it destroy asynchronously

Summary: related to T11798, #5

Reviewers: ivica

Reviewed By: ivica

Subscribers: miljen, iljazovic

Differential Revision: https://repo.mireo.local/D27882

include/async_mqtt5/impl/autoconnect_stream.hpp

@@ -81,6 +81,10 @@ public:
 		_endpoints.brokers(std::move(hosts), default_port);
 	}
 
+	void clone_endpoints(const autoconnect_stream& other) {
+		_endpoints.clone_servers(other._endpoints);
+	}
+
 	bool is_open() const noexcept {
 		return lowest_layer(*_stream_ptr).is_open();
 	}