curl tests: updated select() error handling, file doxy

Tests reports now about unexpected errors from select() and
source code line number to simplify problematic position
locating.
Used much smaller timeout on W32 if system is doing some
sockets data processing in other threads.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/testcurl/test_digestauth_sha256.c b/src/testcurl/test_digestauth_sha256.c
index 5023bcad..7cb9557e 100644
--- a/src/testcurl/test_digestauth_sha256.c
+++ b/src/testcurl/test_digestauth_sha256.c
@@ -1,6 +1,7 @@
 /*
      This file is part of libmicrohttpd
      Copyright (C) 2010, 2018 Christian Grothoff
+     Copyright (C) 2019-2021 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
@@ -23,6 +24,7 @@
  * @brief  Testcase for libmicrohttpd Digest Auth with SHA256
  * @author Amr Ali
  * @author Christian Grothoff
+ * @author Karlson2k (Evgeny Grin)
  */
 
 #include "MHD_config.h"