possible NIO selector leak in 7u25

[Bernd Eckenfels]

Hello,

I will have a look at 7u40 and 8 as soon as I get some time. But I dont  
think it is thread(caching) related as it does not show up in the heapdump  
(and we have a controled thread creation rate). It looks more like some  
close/cancel interactions (and a real leak).

I will let you know what I find. Thanks David, Alan and Sean!

Greetings
Bernd