testcurl/https: updated copyright year in modified files, fixed some doxy

src/testcurl/https/test_https_sni.c

@@ -1,6 +1,7 @@
 /*
   This file is part of libmicrohttpd
   Copyright (C) 2013, 2016 Christian Grothoff
+  Copyright (C) 2016-2022 Evgeny Grin (Karlson2k)
 
   libmicrohttpd is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
@@ -22,6 +23,7 @@
  * @file test_https_sni.c
  * @brief  Testcase for libmicrohttpd HTTPS with SNI operations
  * @author Christian Grothoff
+ * @author Karlson2k (Evgeny Grin)
  */
 #include "platform.h"
 #include "microhttpd.h"