[libvirt] [PATCH 0/4] Some RPC event handler ref counting fixes

["Daniel P. Berrange" <berrange redhat com>]

Wen previously posted a report of a crash with migration. I could
not reproduce it at the time, but since then someone else did and
pointed out that it only occurs when TLS is in use

https://www.redhat.com/archives/libvir-list/2011-July/msg00547.html

This series of patches make the event handler reference counting
more robust to avoid this problem