[7u4] Request for approval for CR 7120875 Networking updates (ipv6) and regression test script fixes for macos port

[Mike Swingler]

On Dec 22, 2011, at 8:20 AM, Michael McMahon wrote:

> This is a request to push the following changeset to jdk7u-osx.
> 
> CR: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7120875
> 
> Webrev: http://cr.openjdk.java.net/~michaelm/7120875/webrev.5/
> 
> reviewed by: alanb

What's up with the magic "576" number in test/java/net/DatagramSocket/Send12k.java?

Also, for OS checks, we always use the form:
if(System.getProperty("os.name").startsWith("Mac"))

Just curious,
Mike Swingler
Apple Inc.