mdelete and Cache::Memcached::delete_multi()

[dormando]

> That's correct, the server won't block.  But it will stay in
> conn_write state until TRANSMIT_COMPLETE, while next request may be
> read only in conn_read state, so the client will block.  The following
> script shows this (though you may have to increase $count):

Yeah, I completely misunderstood the IOV setup. Oh well.

I'd consider it a bug that this script works. :)

-Dormando