added a comment referring to the bug report

sql/mysqld.cc

@@ -657,6 +657,12 @@ static void close_connections(void)
   {
     DBUG_PRINT("quit",("Informing thread %ld that it's time to die",
 		       tmp->thread_id));
+    /* 
+     Re: bug 7403 - close_connection will be called mulitple times
+     bug a wholesale clean up of our network code is a very large 
+     project.  This will wake up the socket on Windows and prevent the
+     printing of the error message that we are force closing a connection.
+    */
     close_connection(tmp, 0, 1);  
     if (tmp->mysys_var)
     {