libxl: convert to typesafe virConf accessors
libxl: convert to typesafe virConf accessors

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

jfehlig/libvirt,crobinso/libvirt,taget/libvirt,datto/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,nertpinx/libvirt,taget/libvirt,jardasgit/libvirt,crobinso/libvirt,taget/libvirt,jardasgit/libvirt,eskultety/libvirt,datto/libvirt,datto/libvirt,olafhering/libvirt,taget/libvirt,datto/libvirt,VenkatDatta/libvirt,libvirt/libvirt,libvirt/libvirt,zippy2/libvirt,eskultety/libvirt,jfehlig/libvirt,eskultety/libvirt,zippy2/libvirt,nertpinx/libvirt,libvirt/libvirt,VenkatDatta/libvirt,eskultety/libvirt,andreabolognani/libvirt,taget/libvirt,VenkatDatta/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,crobinso/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,datto/libvirt,crobinso/libvirt,VenkatDatta/libvirt,zippy2/libvirt,olafhering/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,olafhering/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jardasgit/libvirt