Reapply "refactor: App use Uniqueprt for SocketMultiplexer"

This reverts commit 6f18cf74c5.

src/lib/deskflow/App.h

@@ -11,6 +11,7 @@
 #include "base/Log.h"
 #include "common/Common.h"
 #include "deskflow/IApp.h"
+#include "net/SocketMultiplexer.h"
 
 #if SYSAPI_WIN32
 #include "deskflow/win32/AppUtilWindows.h"
@@ -18,6 +19,7 @@
 #include "deskflow/unix/AppUtilUnix.h"
 #endif
 
+#include <memory>
 #include <stdexcept>
 
 namespace deskflow {
@@ -91,14 +93,14 @@ public:
   {
     m_events = &events;
   }
-  void setSocketMultiplexer(SocketMultiplexer *sm)
+  void setSocketMultiplexer(std::unique_ptr<SocketMultiplexer> &&sm)
   {
-    m_socketMultiplexer = sm;
+    m_socketMultiplexer = std::move(sm);
   }
 
   SocketMultiplexer *getSocketMultiplexer() const
   {
-    return m_socketMultiplexer;
+    return m_socketMultiplexer.get();
   }
 
   static App &instance()
@@ -119,7 +121,7 @@ private:
   static App *s_instance;
   FileLogOutputter *m_fileLog = nullptr;
   ARCH_APP_UTIL m_appUtil;
-  SocketMultiplexer *m_socketMultiplexer = nullptr;
+  std::unique_ptr<SocketMultiplexer> m_socketMultiplexer;
 };
 
 #if WINAPI_MSWINDOWS

src/lib/deskflow/ClientApp.cpp

@@ -372,8 +372,7 @@ int ClientApp::mainLoop()
 {
   // create socket multiplexer.  this must happen after daemonization
   // on unix because threads evaporate across a fork().
-  SocketMultiplexer multiplexer;
-  setSocketMultiplexer(&multiplexer);
+  setSocketMultiplexer(std::make_unique<SocketMultiplexer>());
 
   // start client, etc
   appUtil().startNode();

src/lib/deskflow/ServerApp.cpp

@@ -574,8 +574,7 @@ int ServerApp::mainLoop()
 {
   // create socket multiplexer.  this must happen after daemonization
   // on unix because threads evaporate across a fork().
-  SocketMultiplexer multiplexer;
-  setSocketMultiplexer(&multiplexer);
+  setSocketMultiplexer(std::make_unique<SocketMultiplexer>());
 
   // if configuration has no screens then add this system
   // as the default