libvirt security update

[0.8.1-27.0.1.el6_0.5]

• Replace docs/et.png in tarball with blank image
  [0.8.1-27.el6_0.5]
• Properly report error in virConnectDomainXMLToNative (CVE-2011-1146)
  [0.8.1-27.el6_0.4]
• Add missing checks for read-only connections (CVE-2011-1146)
  [0.8.1-27.el6_0.3]
• Remove patches not suitable for proper Z-stream:
  • Export host information through SMBIOS to guests (rhbz#652678)
  • Support forcing a CDROM eject (rhbz#658147)
• Plug several memory leaks (rhbz#672549)
• Avoid memory overhead of matchpathcon (rhbz#672554)
• Do not start libvirt-guests if that service is off (rhbz#668694)
  [0.8.1-27.el6_0.2]
• spec file cleanups (rhbz#662045)
• Fix deadlock on concurrent multiple bidirectional migration (rhbz#662043)
• Fix off-by-one error in clock-variable (rhbz#662046)
• Export host information through SMBIOS to guests (rhbz#652678)
• Ensure device is deleted from guest after unplug (rhbz#662041)
• Distinguish between QEMU domain shutdown and crash (rhbz#662042)
  [0.8.1-27.el6_0.1]
• Fix JSON migrate_set_downtime command (rhbz#658143)
• Make SASL work over UNIX domain sockets (rhbz#658144)
• Let qemu group look below /var/lib/libvirt/qemu/ (rhbz#656972)
• Fix save/restore on root_squashed NFS (rhbz#656355)
• Fix race on multiple migration (rhbz#658141)
• Export host information through SMBIOS to guests (rhbz#652678)
• Support forcing a CDROM eject (rhbz#658147)