Kernel-xen & xen updates

Just posted an update to both kernel-xen and the xen packages.

Xen changelog:

* Sun Aug 14 2011 Michael Young <m.a.young> - 4.1.1-3
- untrusted guest controlling PCI[E] device can lock up host CPU [CVE-2011-3131]

kernel-xen changelog:

* Fri Aug 19 2011 Steven Haigh <netwiz@crc.id.au>
! Note: USB-DVB still seems to be broken.
- commit 'v2.6.32.45':
- Linux 2.6.32.45
- powerpc: pseries: Fix kexec on machines with more than 4TB of RAM
- powerpc: Fix device tree claim code
- ALSA: snd-usb-caiaq: Fix keymap for RigKontrol3
- ALSA: timer - Fix Oops at closing slave timer
- net: Compute protocol sequence numbers and fragment IDs using MD5.
- crypto: Move md5_transform to lib/md5.c</netwiz></blockquote>

Details on how to use these packages and set up a repository are available on the EL6 and Xen howto guide.