tools/dhtnode: use utf-8 for console output on Windows

tools/dhtnode.cpp

@@ -27,6 +27,10 @@ extern "C" {
 #include <gnutls/gnutls.h>
 }
 
+#ifdef _WIN32
+#include <ConsoleApi2.h>
+#endif
+
 #include <set>
 #include <thread> // std::this_thread::sleep_for
 
@@ -515,6 +519,10 @@ void cmd_loop(std::shared_ptr<DhtRunner>& node, dht_params& params
 int
 main(int argc, char **argv)
 {
+#ifdef _WIN32
+    SetConsoleOutputCP(CP_UTF8);
+    SetConsoleCP(CP_UTF8);
+#endif
 #ifdef _MSC_VER
     if (auto err = gnutls_global_init()) {
         std::cerr << "Failed to initialize GnuTLS: " << gnutls_strerror(err) << std::endl;