libvirt 0.4.6-10+lenny1 stable update

[Guido Günther <agx@sigxcpu.org>]

Hi,
I'd like to upload a new version of libvirt to stable fixing two issues:

  * CVE-2010-2242: Apply a source port mapping to virtual network
    masquerading
  * Fix path to hvmloader. (Closes: #573808)

The first fixes a minor security issue, the update is the backport of an
upstream fix:

http://git.debian.org/?p=pkg-libvirt/libvirt.git;a=commit;h=dcdab940c808defb589559567e38b94ecfebb793

The later one fixes a major annoyance for people using Xen with libvirt
by fixing the path to the HVM loader:

http://git.debian.org/?p=pkg-libvirt/libvirt.git;a=commit;h=ce08070c680dc3a3deea50cca36d598636ff7aac

The debdiff is attached. O.k. to upload?
Cheers,
 -- Guido