stop binlog background thread together with others

that fixes many rpl tests failures

sql/log.cc

@@ -3171,6 +3171,21 @@ MYSQL_BIN_LOG::MYSQL_BIN_LOG(uint *sync_period)
   bzero((char*) &purge_index_file, sizeof(purge_index_file));
 }
 
+void MYSQL_BIN_LOG::stop_background_thread()
+{
+  if (binlog_background_thread_started)
+  {
+    mysql_mutex_lock(&LOCK_binlog_background_thread);
+    binlog_background_thread_stop= true;
+    mysql_cond_signal(&COND_binlog_background_thread);
+    while (binlog_background_thread_stop)
+      mysql_cond_wait(&COND_binlog_background_thread_end,
+                      &LOCK_binlog_background_thread);
+    mysql_mutex_unlock(&LOCK_binlog_background_thread);
+    binlog_background_thread_started= false;
+  }
+}
+
 /* this is called only once */
 
 void MYSQL_BIN_LOG::cleanup()
@@ -3181,17 +3196,8 @@ void MYSQL_BIN_LOG::cleanup()
     xid_count_per_binlog *b;
 
     /* Wait for the binlog background thread to stop. */
-    if (!is_relay_log && binlog_background_thread_started)
-    {
-      mysql_mutex_lock(&LOCK_binlog_background_thread);
-      binlog_background_thread_stop= true;
-      mysql_cond_signal(&COND_binlog_background_thread);
-      while (binlog_background_thread_stop)
-        mysql_cond_wait(&COND_binlog_background_thread_end,
-                        &LOCK_binlog_background_thread);
-      mysql_mutex_unlock(&LOCK_binlog_background_thread);
-      binlog_background_thread_started= false;
-    }
+    if (!is_relay_log)
+      stop_background_thread();
 
     inited= 0;
     close(LOG_CLOSE_INDEX|LOG_CLOSE_STOP_EVENT);

sql/log.h

@@ -589,6 +589,8 @@ class MYSQL_BIN_LOG: public TC_LOG, private MYSQL_LOG
   mysql_cond_t COND_binlog_background_thread;
   mysql_cond_t COND_binlog_background_thread_end;
 
+  void stop_background_thread();
+
   using MYSQL_LOG::generate_name;
   using MYSQL_LOG::is_open;
 

sql/mysqld.cc

@@ -1717,6 +1717,7 @@ static void close_connections(void)
 
   Events::deinit();
   end_slave();
+  mysql_bin_log.stop_background_thread();
 
   /*
     Give threads time to die.