libxl: Domain event handler improvements
libxl: Domain event handler improvements

Since libxl provides the domain ID in the event handler callback,
find the domain object based on the ID.  This approach prevents
processing the callback on a domain that has already been reaped.

Also, similar to the xl implementation, ignore the SUSPEND shutdown
reason.  By calling libxl_domain_suspend(), we know a shutdown
event with SUSPEND reason will be generated, but it can be safely
ignored since any subsequent cleanup will be done by the callers.

eskultety/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,trainstack/libvirt,crobinso/libvirt,elmarco/libvirt,elmarco/libvirt,eskultety/libvirt,agx/libvirt,agx/libvirt,shugaoye/libvirt,libvirt/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,trainstack/libvirt,jardasgit/libvirt,iam-TJ/libvirt,shugaoye/libvirt,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,elmarco/libvirt,agx/libvirt,cbosdo/libvirt,siboulet/libvirt-openvz,crobinso/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,nertpinx/libvirt,eskultety/libvirt,taget/libvirt,iam-TJ/libvirt,rlaager/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,libvirt/libvirt,jardasgit/libvirt,agx/libvirt,taget/libvirt,datto/libvirt,zippy2/libvirt,elmarco/libvirt,trainstack/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,shugaoye/libvirt,jfehlig/libvirt,datto/libvirt,iam-TJ/libvirt,cbosdo/libvirt,agx/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,trainstack/libvirt,fabianfreyer/libvirt,zippy2/libvirt,zippy2/libvirt,taget/libvirt,olafhering/libvirt,siboulet/libvirt-openvz,rlaager/libvirt,jfehlig/libvirt,cbosdo/libvirt,olafhering/libvirt,datto/libvirt,siboulet/libvirt-openvz,iam-TJ/libvirt,trainstack/libvirt,datto/libvirt,rlaager/libvirt,olafhering/libvirt,cbosdo/libvirt,jardasgit/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,taget/libvirt,nertpinx/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,andreabolognani/libvirt,trainstack/libvirt,elmarco/libvirt,taget/libvirt,libvirt/libvirt,datto/libvirt,crobinso/libvirt,fabianfreyer/libvirt,olafhering/libvirt,jardasgit/libvirt,eskultety/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,shugaoye/libvirt,jfehlig/libvirt,crobinso/libvirt,rlaager/libvirt,iam-TJ/libvirt,andreabolognani/libvirt,libvirt/libvirt,trainstack/libvirt