Fix a potential deadlock in ApiClient::Disconnect

refs #6724

lib/remote/apiclient.cpp

@@ -94,6 +94,11 @@ void ApiClient::SendMessageSync(const Dictionary::Ptr& message)
 }
 
 void ApiClient::Disconnect(void)
+{
+	Utility::QueueAsyncCallback(boost::bind(&ApiClient::DisconnectSync, this));
+}
+
+void ApiClient::DisconnectSync(void)
 {
 	Log(LogWarning, "ApiClient", "API client disconnected for identity '" + m_Identity + "'");
 

lib/remote/apiclient.hpp

@@ -55,6 +55,7 @@ public:
 	ConnectionRole GetRole(void) const;
 
 	void Disconnect(void);
+	void DisconnectSync(void);
 
 	void SendMessage(const Dictionary::Ptr& request);