georg, andery, ulf:
hello, there is a bug in mysqlnd, the details about this bug can
be found at https://bugs.php.net/bug.php?id=55473
I found the reason is that mysqlnd_connect didn't free the stream
when doing reconnect.
I have submitted a patch for this, but I am not very sure the
patch is okey.
could you review this patch? thanks.