[7u6] Request for approval for CR 6346658: (se) Selector briefly spins when asynchronously closing a registered channel [win]

[Seán Coffey]

I'd like to backport this from JDK 8 to 7u6.

Identical changes compared to those of JDK 8.

JDK 8 changeset : http://hg.openjdk.java.net/jdk8/tl/jdk/rev/7326971f09af
Bug report : http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6346658
7u6 webrev : http://cr.openjdk.java.net/~coffeys/webrev.6346658.7u6/ 
<http://cr.openjdk.java.net/%7Ecoffeys/webrev.6346658.7u6/>

regards,
Sean.