Addendum to the fix for bug #52315: need to set a proper shutdown type

when an out-of-supported-range date is detected.

sql/sql_parse.cc

@@ -2243,8 +2243,12 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
       SHUTDOWN_DEFAULT is 0. If client is >= 4.1.3, the shutdown level is in
       packet[0].
     */
-    enum mysql_enum_shutdown_level level=
-      (enum mysql_enum_shutdown_level) (uchar) packet[0];
+    enum mysql_enum_shutdown_level level;
+    if (!thd->is_valid_time())
+      level= SHUTDOWN_DEFAULT;
+    else
+      level= (enum mysql_enum_shutdown_level) (uchar) packet[0];
+
     DBUG_PRINT("quit",("Got shutdown command for level %u", level));
     if (level == SHUTDOWN_DEFAULT)
       level= SHUTDOWN_WAIT_ALL_BUFFERS; // soon default will be configurable