Libvirt 1.2.18 build for Centos6 with patch:
[PATCH 0/2] Fix bridge creation/deletion on 2.6.x kernels (https://bugzilla.redhat.com/show_bug.cgi?id=1252780)
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/mclarkson/libvirt-1.2.18/