Please backport virtualbox 4.3.28-dfsg-1build1 (multiverse) from vivd

[Martin Stechert]

Please backport virtualbox 4.3.28-dfsg-1build1 (multiverse) from vivd to trusty

Reason for the backport:
========================
upgrading to (at least) 4.3.22 in trusty would allow running linux-image-generic-lts-vivid (3.19)
buliding dkms modules fails with 4.3.10

http://ubuntuhandbook.org/index.php/2015/02/virtualbox-fixed-kernel-3-19/

Testing:
========
Mark off items in the checklist [X] as you test them, but please leave the checklist so that backporters can quickly evaluate the state of testing.

You can test-build the backport in your PPA with backportpackage:
$ backportpackage -u ppa:<lp username>/<ppa name> -s wily -d vivid virtualbox

* vivid:
[ ] Package builds without modification
[ ] virtualbox-guest-source installs cleanly and runs
[ ] virtualbox-guest-x11-dbgsym installs cleanly and runs
[ ] virtualbox-dkms installs cleanly and runs
[ ] virtualbox-guest-dkms installs cleanly and runs
[ ] virtualbox-source installs cleanly and runs
[ ] virtualbox installs cleanly and runs
[ ] virtualbox-qt-dbgsym installs cleanly and runs
[ ] virtualbox-guest-utils installs cleanly and runs
[ ] virtualbox-guest-x11 installs cleanly and runs
[ ] virtualbox-qt installs cleanly and runs
[ ] virtualbox-dbg installs cleanly and runs
[ ] virtualbox-dbgsym installs cleanly and runs
[ ] virtualbox-guest-utils-dbgsym installs cleanly and runs

Reverse dependencies:
=====================
The following reverse-dependencies need to be tested against the new version of virtualbox. For reverse-build-dependencies (-Indep), please test that the package still builds against the new virtualbox. For reverse-dependencies, please test that the version of the package currently in the release still works with the new virtualbox installed. Reverse- Recommends, Suggests, and Enhances don't need to be tested, and are listed for completeness-sake.

virtualbox-guest-source
-----------------------

virtualbox-dbgsym
-----------------

virtualbox-dkms
---------------

virtualbox-guest-dkms
---------------------

virtualbox-dbg
--------------

virtualbox-source
-----------------

virtualbox-guest-x11-dbgsym
---------------------------

virtualbox-qt-dbgsym
--------------------

virtualbox-guest-utils
----------------------

virtualbox-guest-utils-dbgsym
-----------------------------

virtualbox-guest-x11
--------------------

virtualbox
----------
* vagrant
  [ ] vivid (Reverse-Suggests)
* virtualbox-guest-additions-iso
  [ ] vivid (Reverse-Recommends)
* testdrive-common
  [ ] vivid (Reverse-Depends)
* fdroidserver
  [ ] vivid (Reverse-Suggests)

virtualbox-qt
-------------