xen bug fix update

Updated xen packages that close a memory leak in xend are now available.

Xen is a high performance and secure open source virtualization framework.
Virtualization allows users to run guest operating systems in virtual
machines on top of a host operating system.

These updated xen packages fix the following bug:

* issuing an "xm info" command or any virsh commands caused xend to leak
memory. As well, xend's memory consumption grew very quickly in combination
with cluster suite, which uses virsh to monitor running guests. This update
fixes the underlying errors in the PyList_Append and PyDict_SetItemString
functions that caused the memory leaks. (BZ#528163)

All xen users are advised to upgrade to these updated packages, which
resolve this issue. Note: after installation, the xend service must be
restarted for this update to take effect.

Before applying this update, make sure that all previously-released errata
relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

528163 - sluggish RHEL5.4 dom0 in Dev Virt Cluster