MDEV-10183 implement service_manager_extend_timeout on Windows

The implementation calls SetServiceStatus() with updated
SERVICE_STATUS::dwHint and SERVICE_STATUS::dwCheckpoint

include/my_service_manager.h

@@ -43,7 +43,12 @@
 #define SD_LISTEN_FDS_START (0)
 #define sd_notify(X, Y)
 #define sd_notifyf(E, F, ...)
-#define service_manager_extend_timeout(I, FMTSTR, ...)
+#ifdef _WIN32
+  #define service_manager_extend_timeout(I, F, ...) \
+    mysqld_win_extend_service_timeout(I)
+#else
+  #define service_manager_extend_timeout(I, FMTSTR, ...)
+#endif
 #endif
 
 #endif /* MY_SERVICE_MANAGER_INCLUDED */

sql/mysqld.cc

@@ -2752,6 +2752,12 @@ void mysqld_win_set_startup_complete()
 }
 
 
+void mysqld_win_extend_service_timeout(DWORD sec)
+{
+  my_report_svc_status((DWORD)-1, 0, 2*1000*sec);
+}
+
+
 void mysqld_win_set_service_name(const char *name)
 {
   if (stricmp(name, "mysql"))

sql/mysqld.h

@@ -968,6 +968,7 @@ extern int mysqld_main(int argc, char **argv);
 extern HANDLE hEventShutdown;
 extern void mysqld_win_initiate_shutdown();
 extern void mysqld_win_set_startup_complete();
+extern void mysqld_win_extend_service_timeout(DWORD sec);
 extern void mysqld_set_service_status_callback(void (*)(DWORD, DWORD, DWORD));
 extern void mysqld_win_set_service_name(const char *name);
 #endif

sql/winmain.cc

@@ -81,7 +81,8 @@ static void report_svc_status(DWORD current_state, DWORD exit_code, DWORD wait_h
     return;
 
   static DWORD check_point= 1;
-  svc_status.dwCurrentState= current_state;
+  if (current_state != (DWORD)-1)
+    svc_status.dwCurrentState= current_state;
   svc_status.dwWaitHint= wait_hint;
 
   if (exit_code)