remove workaround from MDEV-9409

client/mysqltest.cc

@@ -873,17 +873,10 @@ static char *my_fgets(char * s, int n, FILE * stream, int *len)
 
 /*
   Wrapper for popen().
-  On Windows, uses binary mode to workaround
-  C runtime bug mentioned in MDEV-9409
 */
 static FILE* my_popen(const char *cmd, const char *mode)
 {
-  FILE *f= popen(cmd, mode);
-#ifdef _WIN32
-  if (f)
-    _setmode(fileno(f), O_BINARY);
-#endif
-  return f;
+  return popen(cmd, mode);
 }
 
 #ifdef EMBEDDED_LIBRARY

mysql-test/main/perror-win.result

 MariaDB error code 150: Foreign key constraint is incorrectly formed
-Win32 error code 150: System trace information was not specified in your CONFIG.SYS file, or tracing is disallowed.
+Win32 error code 150: System trace information was not specified in your CONFIG.SYS file, or tracing is disallowed.
 OS error code  23:  Too many open files in system
-Win32 error code 23: Data error (cyclic redundancy check).
+Win32 error code 23: Data error (cyclic redundancy check).
 MariaDB error code 1062 (ER_DUP_ENTRY): Duplicate entry '%-.192s' for key %d
-Win32 error code 1062: The service has not been started.
+Win32 error code 1062: The service has not been started.
 Illegal error code: 30000

sql/mysqld.cc

@@ -5728,17 +5728,11 @@ int mysqld_main(int argc, char **argv)
   init_ssl();
   network_init();
 
-#ifdef __WIN__
+#ifdef _WIN32
   if (!opt_console)
   {
     FreeConsole();				// Remove window
   }
-
-  if (fileno(stdin) >= 0)
-  {
-    /* Disable CRLF translation (MDEV-9409). */
-    _setmode(fileno(stdin), O_BINARY);
-  }
 #endif
 
 #ifdef WITH_WSREP