[7u8] Request for approval for : 7176485: (bf) Allow temporary buffer cache to grow to IOV_MAX

[Sean Coffey]

Requesting approval to port Alan's NIO fix from JDK 8 to JDK 7u8.

JDK 8 Changeset : http://hg.openjdk.java.net/jdk8/tl/jdk/rev/23394d686f74
JDK 8 review thread : 
http://mail.openjdk.java.net/pipermail/nio-dev/2012-June/001726.html
Bug report : http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7176485

Regards,
Sean.