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

[Michael McMahon]

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