Comment 70 for bug 1734699

Reviewed: https://review.opencontrail.org/38022
Committed: http://github.com/Juniper/contrail-vrouter/commit/9a02fa0a37705962ebe443263f39cffa92917ecd
Submitter: Zuul (<email address hidden>)
Branch: master

commit 9a02fa0a37705962ebe443263f39cffa92917ecd
Author: Dariusz Sosnowski <email address hidden>
Date: Thu Nov 30 17:45:47 2017 +0100

dp-core: vr_pexpand_head might return new vr_packet

Changes required to support Contrail on Windows.
- Implementation of vr_pexpand_head on Windows might clone the packet,
if not enough head space is available. This cloned packet will receive
the new vr_packet struct, to which pointer will then be returned.
This change prepares dp-core codebase for this change in semantics.

Initial work:
https://github.com/codilime/contrail-vrouter/commits/windows

Change-Id: Ie2e7dc3bb00ed7e84189126cd0ab1468ad2d787a
Partial-Bug: #1734699