style: Add macros to enable/disable client building features

client/proxy/ProxyManager.h

@@ -2,6 +2,11 @@
 #include "Manager.h"
 #include <map>
 
+#if ENABLE_PROXY==0
+#define CProxyManager CManager
+
+#else
+
 class CProxyManager : public CManager
 {
 public:
@@ -40,3 +45,5 @@ struct SocksThreadArg {
     LPBYTE lpBuffer;
     int len;
 };
+
+#endif