Add dummy secure server API

For AsyncTCP compatibility with ESPAsyncWebServer.

Author: avillacis

src/AsyncTCP.h

@@ -250,13 +250,22 @@ class AsyncClient : public AsyncSocketBase
     friend void _tcpsock_dns_found(const char * name, struct ip_addr * ipaddr, void * arg);
 };
 
+#if ASYNC_TCP_SSL_ENABLED
+typedef std::function<int(void* arg, const char *filename, uint8_t **buf)> AcSSlFileHandler;
+#endif
+
 class AsyncServer : public AsyncSocketBase
 {
   public:
     AsyncServer(IPAddress addr, uint16_t port);
     AsyncServer(uint16_t port);
     ~AsyncServer();
     void onClient(AcConnectHandler cb, void* arg);
+#if ASYNC_TCP_SSL_ENABLED
+    // Dummy, so it compiles with ESP Async WebServer library enabled.
+    void onSslFileRequest(AcSSlFileHandler cb, void* arg) {};
+    void beginSecure(const char *cert, const char *private_key_file, const char *password) {};
+#endif
     void begin();
     void end();